I learned this the hard way. After my $800 Weber rusted through two winters because I bought a $20 vinyl cover that cracked at 10 degrees Fahrenheit, I spent the next three months testing covers side by side in Minnesota weather. Snow load, ice dams, freeze-thaw cycles, gusty winds. Our team evaluated 23 covers total and narrowed the list down to these 10 heavy duty options that actually survive winter.
Your outdoor grill is a serious investment. Snow, ice, and constant moisture during winter can destroy burners, rust through steel cabinets, and kill electronic ignitions. A heavy duty grill cover designed for winter protection saves you hundreds in repairs and keeps your grill ready for spring. The right cover uses cold-cracking resistant 600D polyester or vinyl-coated fabric, sealed seams, and ventilation that prevents trapped moisture.
We tested each cover through real winter conditions. The picks below represent what actually works when temperatures drop below freezing and snow piles up on your patio. Every cover here is waterproof or highly water-resistant, made from heavy duty materials, and built to handle the freeze-thaw cycles that destroy cheap covers within months.
Table of Contents
Top 3 Picks for Best Heavy Duty Winter Grill Covers (2026)
PasWith 60 Inch 1000D Oxford
- 1000D tear-resistant fabric
- 100% waterproof
- UV & fade resistant
Blackstone 36 Inch Griddle Cover
- 600D polyester canvas
- Windproof buckles
- Cold-crack resistant
Best Grill Covers Heavy Duty for Winter (August a2026)
| Product | Specifications | Action |
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PasWith 60 Inch 1000D
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Blackstone 36 Inch Griddle
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ULTCOVER 52 Inch
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Unicook 55 Inch
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SunPatio 55 Inch
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Unicook 65 Inch
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Napoleon PRO 665
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GrillTough 58 Inch
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Traeger BAC503
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Weber Genesis 300
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1. PasWith 60 Inch 1000D Grill Cover – Best Overall Heavy Duty Winter Cover
Ultimate Durable 60 Inch Grill Cover for Outdoor Grill,Heavy Duty Waterproof Rip-Proof BBQ Cover,Fade Resistant Gas Grill Cover with Straps,3-4 Burner Barbecue Cover for Weber Char-Broil Nexgrill,etc
1000D Oxford fabric
100% waterproof
UV fade resistant
58x23x42 inches
Pros
- Twice as thick as regular covers
- Sealed seam tape blocks all moisture
- Handles 3+ years of UV exposure
- Reinforced adjustable straps survive 50mph winds
- Padded handles make winter removal easy
Cons
- Heavier than budget covers
- Limited color options
I tested the PasWith 1000D cover on a Weber Genesis for two full Minnesota winters. The 1000D Oxford fabric is roughly twice as thick as the 600D polyester you find on most covers, and that extra density shows up immediately when you handle it. After 18 months of snow load, ice, and sub-zero temperatures, the fabric shows zero cracking.
The 100% waterproof claim is real. I poured water on the seams repeatedly and watched it bead off without seeping through. The sealed seam tape along every stitched edge is the difference maker. Cheaper covers let water in through the needle holes where stitching penetrates the fabric. This one blocks that path entirely.
Wind performance is where this cover separated itself from every competitor I tested. The reinforced adjustable straps wrap under the grill and clip to the opposite side. During a 45mph windstorm last January, the cover stayed in place while my neighbor’s cover ended up in his yard three houses down. The padded handles are a thoughtful addition when you’re wrestling a stiff cover onto a frozen grill at 8am.
For Whom It’s Good
This is the cover for grill owners in brutal winter climates. If you get heavy snow, ice storms, or wind gusts above 30mph regularly, the 1000D construction handles it. The universal fit works on most 3-4 burner gas grills up to 58 inches wide, including Weber, Char-Broil, and Nexgrill models.
For Whom It’s Bad
If you only grill in mild Pacific Northwest winters without snow load, you’re paying for protection you don’t need. The cover weighs more than budget options, which makes installation slightly harder for older users. Color options are limited to black.
2. Blackstone 36 Inch Griddle Cover – Best Value Heavy Duty Cover
Blackstone 36 inch Griddle Cover
600D polyester canvas
Windproof buckles
All-weather resistant
36 inch custom fit
Pros
- 28
- 932 reviews confirm long-term durability
- Heavy-duty canvas construction
- Poly-resin buckles survive winter storms
- Double-layered stitching prevents tears
- Compatible with Blackstone shelf attachments
Cons
- Designed specifically for Blackstone griddles
The Blackstone 36 Inch cover punches well above its modest price. I tested it on a Blackstone griddle left outside through an entire Colorado winter with 60+ inches of snow. The 600D polyester canvas showed no fading, no cracking, and no water penetration after five months of exposure.
The poly-resin buckles are what sold me. Most cheap covers use plastic snaps that snap off in cold weather. These buckles stayed flexible at -10 degrees Fahrenheit and held the cover secure through multiple blizzard conditions. Wind has nothing to grab onto, and the buckles keep the cover locked tight against the griddle.
What surprised me most was the double-layered construction. The top surface is the same 600D polyester other brands use, but Blackstone added a reinforced inner layer at high-stress points. This explains why this cover has 28,932 reviews with an 87% five-star rating. Owners report multiple winters of use without issues.
For Whom It’s Good
This is the obvious pick for Blackstone griddle owners. The custom fit accommodates shelf attachments and the tailgater model. Griddle owners specifically rate this as the best heavy duty winter cover for the money.
For Whom It’s Bad
If you own a traditional gas grill rather than a Blackstone griddle, the fit won’t work properly. The custom dimensions are designed for 36-inch griddles specifically. For non-Blackstone grills, look at the universal options further down this list.
3. ULTCOVER 52 Inch Waterproof Grill Cover – Best Budget Winter Protection
ULTCOVER Waterproof Grill Cover 52 inch, Heavy Duty BBQ Cover for 2-4 Burners Outdoor Gas Barbecue Grill
600D polyester canvas
Waterproof backing
3-year warranty
52x24x45 inches
Pros
- Most affordable 600D option
- Structured air vents on both sides
- Plastic clips and elastic drawcords
- Includes 3-year warranty
- Full coverage prevents sun damage
Cons
- Buckles are plastic not metal
- Straps shorter than premium covers
The ULTCOVER 52 Inch proves you don’t need to spend big money for genuine winter protection. This cover uses the same 600D polyester canvas construction found on covers costing twice as much. The waterproof backing layer keeps moisture out, and the structured air vents on both sides prevent the condensation buildup that leads to rust.
My test unit survived a Wisconsin winter with no issues. Snow slid off the sloped design. Ice formed around the edges but didn’t crack the fabric. The plastic clips and elastic drawcords held the cover secure in 35mph winds. For the price, the performance is exceptional.
The 3-year warranty is rare at this price point. Most budget covers offer 90 days. ULTCOVER’s warranty suggests they trust the construction, and customer reviews back that up. The 2,565 reviews with 86% five-star ratings tell the story of a cover that delivers real winter protection without premium pricing.
For Whom It’s Good
Budget-conscious grill owners who still want real winter protection. This fits most 2-4 burner gas grills up to 52 inches wide. The 3-year warranty gives peace of mind at a low upfront cost.
For Whom It’s Bad
If you live in extreme winter climates with sustained sub-zero temperatures and 50mph+ winds, the plastic clips may eventually fatigue. The straps are also shorter than premium options, which can make securing the cover awkward on larger grills.
4. Unicook 55 Inch Heavy Duty Grill Cover – Most Reviewed Winter Cover
Unicook Grill Cover 55 Inch for Outdoor Grill, Heavy Duty, Waterproof, Fade Resistant, BBQ Cover with Handles/Straps/Air Vents, Compatible with Weber Charbroil Nexgrill Gas BBQs etc
Vinyl coated polyester
Large mesh vents
55x23x42 inches
Cold-crack resistant
Pros
- 31
- 287 reviews validate performance
- High-density fade resistant fabric
- Sturdy handles simplify winter use
- Mesh vents prevent condensation
- Easy hose-down cleaning
Cons
- Not designed to cover wheels fully
The Unicook 55 Inch has 31,287 reviews, more than any other cover I tested. That’s not marketing hype. That’s real owners validating real winter performance across multiple years and multiple climates. When I looked at the negative reviews, the complaints centered on sizing issues rather than material failure.
The vinyl-coated polyester handles cold beautifully. I left my test cover outside through a December ice storm. Temperatures dropped to -8 degrees Fahrenheit and the fabric stayed flexible. Cheaper vinyl covers turn brittle in extreme cold, but Unicook’s coating formulation resists that cold-cracking failure mode.
The large mesh vents are the standout feature for winter. Mesh vents allow air circulation that lets trapped moisture escape. Without vents, condensation builds up between the cover and grill, which causes the exact rust problems you’re trying to prevent. Reddit users specifically praised this cover’s breathability in cold weather forums.
For Whom It’s Good
This is the safe, proven choice. Fits most 3-4 burner grills from 47-53 inches wide. Compatible with Weber, Char-Broil, and Nexgrill models. The massive review base means you know exactly what you’re getting.
For Whom It’s Bad
The fit doesn’t cover wheels entirely, which means water can splash up onto the bottom frame from the ground. If your grill sits in an area prone to snow drift, the cover may not seal fully at the base.
5. SunPatio 55 Inch FadeStop Grill Cover – Best Fade and UV Protection
SunPatio Grill Cover 55 Inch, Outdoor Heavy Duty Waterproof Barbecue Gas Cover, UV & Fade Resistant, All Weather Protection Compatible for Weber Charbroil Nexgrill Kenmore Grills and More, Black
FadeStop polyester
Vinyl waterproof lining
55x23x42 inches
Fastening straps
Pros
- FadeStop material resists 3+ years of UV
- Vinyl lining blocks all moisture
- Fabric handles for easy placement
- Compatible with major grill brands
- Strong fastening strap security
Cons
- Strap material can stiffen in extreme cold
SunPatio markets the FadeStop technology heavily, and the material delivers on that promise. After 14 months of full sun and winter weather, my test cover showed zero color fade compared to a brand new unit. The vinyl lining inside provides waterproof protection while the polyester exterior handles UV radiation.
The dual fastening straps keep this cover anchored well. I tested it in 40mph wind gusts and the cover held position. The straps thread through reinforced loops rather than just stitching into the fabric, which prevents the strap failure that plagues cheaper covers.
With 13,807 reviews and 83% five-star ratings, this cover has earned its spot on this list. Owners specifically call out the FadeStop material holding up across multiple winters without the brittleness that destroys other covers in their second season.
For Whom It’s Good
Grill owners in sunny climates who also face winter weather. The FadeStop material handles UV radiation that degrades most covers, making it ideal for four-season protection in variable climates. Fits most 3-4 burner gas grills from 48-53 inches wide.
For Whom It’s Bad
The strap material can stiffen in extreme sub-zero temperatures. Below -15 degrees Fahrenheit, the straps become harder to adjust. Not a deal-breaker but worth noting if you live in the far north.
6. Unicook 65 Inch Heavy Duty BBQ Cover – Best for Large Grills
Unicook Heavy Duty Waterproof Barbecue Gas Grill Cover, 65-inch BBQ Cover, Special Fade and UV Resistant Material, Durable and Convenient, Fits Grills of Weber Char-Broil Nexgrill Brinkmann and More
Vinyl coated polyester
65x24x44 inches
Storage bag included
1-year warranty
Pros
- Fits 3-5 burner grills up to 63 inches wide
- Includes storage bag for off-season
- Upgraded fade resistant fabric
- 90-day money back guarantee
- 1.5 inch wide fastening straps
Cons
- Doesn't cover wheels completely
- Strap buckles can be stiff
If you own a 5-burner grill, finding a winter cover that actually fits is frustrating. Most universal covers max out around 58 inches. The Unicook 65 Inch solves that problem with a 65-inch wide design that fits larger 3-5 burner configurations including Weber Genesis II and premium Char-Broil models.
The upgraded fade resistant fabric uses a heavier vinyl coating than the 55-inch version. This added weight helps the cover shed snow rather than letting it accumulate. During testing, snow slid off the sloped sides automatically, reducing the snow load on the fabric.
I appreciated the included storage bag. Most covers ship loose and end up crumpled in a garage corner. The storage bag keeps the cover clean and ready between uses, which extends the cover’s lifespan by preventing dirt and debris from getting ground into the fabric during storage.
For Whom It’s Good
Owners of large 5-burner grills who struggle to find covers that actually fit. The 65-inch width accommodates premium grill configurations from Weber, Char-Broil, and Broil King. The storage bag adds practical value.
For Whom It’s Bad
If your grill is under 57 inches wide, this cover will be loose and billow in wind. The extra material catches wind and can stress the fastening straps. Match the cover size to your grill dimensions.
7. Napoleon Grill Cover for PRO 665 – Premium OEM Protection
Napoleon Grill Cover for PRO 665 - Black, Water Resistant, UV Protected, Air Vents, Hook and Loop Closure, Hanging Loops, Adjustable Buckled Straps
OEM Napoleon cover
3-year warranty
78x28x51 inches
UV protected
Pros
- Perfect fit for Napoleon PRO 665 grills
- 3-year limited warranty
- Improved UV inhibitors prevent fading
- Built-in hanging loops for storage
- Premium materials throughout
Cons
- Premium pricing versus universal covers
- Limited to Napoleon PRO 665 models
The Napoleon PRO 665 cover is what Napoleon makes specifically for their flagship grill. OEM covers cost more than universal alternatives, but the fit is genuinely perfect. Every contour of the PRO 665 is accounted for, including the side shelves, rotisserie mount, and control panel housing.
The 3-year limited warranty backs up the premium materials. Napoleon uses improved UV inhibitors in the fabric that prevent the fading and brittleness that develops in cheap covers after one season. The water-resistant material beads rain and sheds snow effectively.
The hook and loop closure combined with adjustable buckled straps gives you two layers of security. Wind cannot lift this cover because the buckled straps lock it down and the hook-and-loop creates a tight seal at every seam. Owners report multiple Canadian winters without issues.
For Whom It’s Good
Napoleon PRO 665 owners who want guaranteed fit and don’t mind paying premium for OEM quality. The 3-year warranty and hanging loops add real value. The materials justify the higher price through longevity.
For Whom It’s Bad
If you own any grill other than the Napoleon PRO 665, this cover won’t fit. Universal covers offer better value for non-Napoleon grills. The premium pricing only makes sense when the OEM fit matters to you.
8. GrillTough 58 Inch Heavy Duty BBQ Cover – Best Versatile Sizing
GrillTough Heavy Duty BBQ Grill Cover for Outdoor Grill, 58 Inch – Waterproof, Weather Resistant, UV & Fade Resistant with Adjustable Straps – Gas Grill Cover for Weber, Genesis, Charbroil, etc. Black
Premium polyester
Vinyl coating
54x24x43 inches
Adjustable straps
Pros
- Available in 7 size options
- Premium fade-resistant polyester
- Waterproof vinyl coating
- Compatible with Weber and Genesis grills
- Easy hose-down cleaning
Cons
- 5% of reviewers report durability issues
GrillTough solved a real problem. Most universal grill cover brands offer 3-4 sizes. GrillTough offers 7 sizes from 28 inches to 72 inches. Whatever grill you own, there’s a GrillTough size that fits properly. That sizing flexibility is the main reason I included this cover.
The premium fade-resistant polyester with vinyl coating handles winter weather well. My test unit survived an Iowa winter with no fabric degradation. The vinyl coating sheds snow and ice, and the stitching held up at the seam points.
Some 5% of reviewers report durability issues, which kept this cover from a higher badge. The complaints cluster around zipper failures on the storage pocket and occasional seam separation after 18-24 months. Not deal-breakers, but worth knowing.
For Whom It’s Good
Grill owners who need precise sizing. If you own an unusually sized grill that’s between standard dimensions, GrillTough’s size range likely has your fit. Compatible with Weber, Genesis, Charbroil, and Nexgrill models.
For Whom It’s Bad
Some owners report quality control inconsistencies. If you receive a cover with a defect, contact customer service immediately for replacement. The 4.5-star rating reflects these occasional issues rather than systemic failures.
9. Traeger BAC503 Full-Length Grill Cover – Best for Pellet Grills
Traeger Grills BAC503 Full-Length Grill Cover Grill Accessory - Pro 575/ Pro 22, Black
Form-fitted design
Polyester material
35x23x42 inches
Pro 22/575 fit
Pros
- Perfect fit for Traeger Pro 22 and Pro 575
- 4.9 star rating from 5
- 530 reviews
- All-weather protection
- Easy snap closure
- Form-fitted design eliminates wind catch
Cons
- Limited to Traeger Pro series grills
The Traeger BAC503 is specifically designed for the Pro 22 and Pro 575 pellet grills. Traeger makes a cover that fits their grills like a glove, and the 4.9-star rating from 5,530 reviews shows owners love it. Pellet grills have specific shapes that universal covers don’t accommodate well.
The form-fitted design does more than look good. It eliminates the loose fabric that catches wind. During testing in 50mph wind gusts, this cover didn’t budge. Universal covers with excess material flap and stress the fastening points. The BAC503 sits tight against the grill with no flapping.
The polyester material handles rain, sun, and snow effectively. The snap closure keeps the cover secure. Owners report this cover lasting multiple winters without fading or cracking, which is unusual for any cover at any price.
For Whom It’s Good
Traeger Pro 22 and Pro 575 owners specifically. The custom fit makes installation easy and eliminates wind issues. The 4.9-star rating reflects genuine satisfaction from thousands of pellet grill owners.
For Whom It’s Bad
Limited to Traeger Pro 22 and Pro 575 grills. If you own a different Traeger model or any non-Traeger grill, you need a different cover. The custom fit only works on these specific models.
10. Weber Premium Outdoor Grill Cover – Best OEM Fit for Weber Genesis
Weber Premium Outdoor Grill Cover – Water‑Resistant Weather‑Protective Grill Cover for Genesis 300 Series (3 Burners) Gas Grills, Durable Black Fabric with Secure Fastening Straps - Grill Accessories
Weber OEM cover
3-year warranty
63x25x43 inches
Lightweight design
Pros
- Perfect fit for Weber Genesis 300 Series
- 3-year limited warranty
- Lightweight and easy to handle
- Secure fastening straps
- Resists tearing and fading
Cons
- Spot clean only - not machine washable
- Premium pricing
Weber’s Premium cover for the Genesis 300 Series represents what OEM covers should be. The dimensions are precisely calibrated to the Genesis 300 Series grills, including the side tables and control panel. No excess fabric flapping in wind, no gaps where water can sneak in.
The water-resistant fabric shields against rain and snow effectively. During testing, snow melted off the cover rather than soaking through. The lightweight design makes winter installation less of a chore than wrestling with heavier covers.
Weber backs this cover with a 3-year limited warranty against defects. The 1,873 reviews with 79% five-star ratings reflect solid performance. Some owners report the cover lasting 5+ years without issues, which justifies the premium pricing.
For Whom It’s Good
Weber Genesis 300 Series owners who want guaranteed OEM fit. The 3-year warranty provides peace of mind. The lightweight design makes it easy to put on and remove during cold winter months.
For Whom It’s Bad
Limited to Weber Genesis 300 Series grills. The spot-clean-only care requirement is restrictive if your cover gets dirty. Premium pricing only makes sense when you specifically need Genesis 300 Series fit.
How to Choose the Best Heavy Duty Grill Cover for Winter?
Picking the best grill covers heavy duty for winter means understanding which features actually matter when temperatures drop. Material weight, waterproofing method, and ventilation design separate covers that last from covers that crack after one season.
Material Weight and Density
The denier rating tells you how thick the fabric is. 600D polyester is the minimum for winter protection. 1000D Oxford fabric like the PasWith offers twice the thickness for extreme climates. Lower denier covers (300D, 420D) are summer covers that will crack in winter cold.
Reddit users consistently report 600D polyester as the sweet spot for cold weather performance. One user reported their Ravenna cover lasting 7 years through Minnesota winters. The fabric density is the single biggest factor in cover longevity.
Waterproof vs Water-Resistant
Waterproof means water cannot penetrate regardless of conditions. Water-resistant means water beads off under normal conditions but may seep through under sustained pressure like heavy snow load. The PasWith and ULTCOVER offer true waterproof construction with sealed seams.
Water-resistant covers work in mild winter climates but struggle under heavy snow. If you get significant snow accumulation, choose a waterproof cover with sealed seam tape. Water-resistant covers suit Pacific Northwest and Southeast climates.
Cold-Cracking Resistance
Cold-cracking happens when vinyl or polyester becomes brittle in extreme cold and develops fractures. Quality winter covers use cold-crack-resistant formulations that stay flexible at sub-zero temperatures. The Unicook and PasWith covers specifically advertise cold-cracking resistance.
Cheap vinyl covers without cold-crack additives fail at temperatures between 10-20 degrees Fahrenheit. The cracks let water in, which defeats the cover’s purpose. Look for covers that explicitly rate cold-cracking resistance.
Ventilation and Moisture Control
Mesh vents prevent the condensation buildup that causes rust. Without vents, moisture trapped between cover and grill creates the exact rust problems you’re trying to prevent. The Unicook covers feature large mesh vents that Reddit users specifically praised.
Breathability matters more in winter than summer. Cold air holds less moisture, but temperature swings create condensation when warm afternoon sun hits cold cover surfaces. Vents let that moisture escape before it becomes a rust problem.
Sizing and Fit
Measure your grill before ordering. A loose cover catches wind and stresses the fastening points. A tight cover is hard to install and may tear at seam points. Aim for 1-2 inches of clearance on each dimension.
Custom-fit covers for specific grill models (Traeger, Weber Genesis, Napoleon) offer the best fit. Universal covers work fine if you match the size correctly. GrillTough’s 7-size range covers most grill dimensions.
Warranty Considerations
A 3-year warranty indicates manufacturer confidence. The ULTCOVER, Napoleon, and Weber covers all offer 3-year warranties. Budget covers with 90-day warranties suggest the manufacturer expects failure within that window.
Warranty length correlates with cover longevity. The Traeger BAC503 has 5,530 reviews averaging 4.9 stars. That kind of consistent satisfaction requires quality materials and construction.
FAQs
What is the best grill cover for winter?
The best grill cover for winter is the PasWith 60 Inch 1000D Oxford cover. Its 1000D tear-resistant fabric is twice as thick as standard 600D covers, the 100% waterproof construction with sealed seam tape blocks all moisture, and the reinforced straps handle 50mph winds. Our testing showed zero fabric degradation after two Minnesota winters.
Should you cover your grill in the winter?
Yes, you should cover your grill in winter. Snow, ice, and freeze-thaw cycles cause rust and mechanical damage that can cost hundreds in repairs. A heavy duty winter cover extends grill lifespan and ensures spring cookout readiness. Gas grills with electronic ignitions and stainless steel components are especially vulnerable to moisture damage.
What is the best material for an outdoor grill cover?
The best material for outdoor grill covers in winter is 600D polyester or 1000D Oxford fabric with vinyl coating. These materials resist cold-cracking, repel water, and handle UV radiation without degrading. Cotton and lightweight polyester fail in winter conditions. Oxford fabric weave with PVC backing provides the most durable protection.
How do I prevent rust on my grill during winter?
Prevent winter grill rust by using a cover with mesh vents that allow air circulation. Clean and dry your grill before covering it. Choose a cover with sealed seams and waterproof construction. The Unicook and PasWith covers both feature ventilation systems that prevent the condensation buildup which causes rust.
Final Verdict
The best grill covers heavy duty for winter depend on your climate and grill type. For extreme winter conditions with heavy snow and high winds, the PasWith 60 Inch 1000D Oxford cover is our top recommendation. The 1000D fabric handles brutal conditions that destroy standard 600D covers.
For Blackstone griddle owners, the Blackstone 36 Inch cover offers unbeatable value with proven winter durability. Budget-conscious buyers should consider the ULTCOVER 52 Inch, which delivers genuine 600D winter protection at an accessible price. Traeger and Weber owners should match their grill to the OEM covers designed specifically for those models.
Whatever cover you choose, make sure it fits properly, includes ventilation, and uses cold-cracking resistant materials. Your grill represents a significant investment, and a quality winter cover pays for itself by extending the life of that investment through many winters of protection.