Disclosure
This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
I’ve spent time testing the GUYISS Blue and GUYISS Coffee generator covers, both sized at 38″L x 28″W x 27″H for large generators. They share the same 900D+210D double-layer Oxford fabric and a flip-top design for adding fuel while running — but a couple of key differences set them apart.
If you’re trying to decide between these two identical-looking covers, the real trade-off comes down to color preference versus a massive weight difference. Stick with me and I’ll break down which one actually makes sense for your setup.
🏆 Quick Picks — My Top Recommendations
Best Overall: GUYISS Blue Cover
Lightweight at 2.8 pounds with over 600 ratings — proven durability and easy handling — Check Price →
Runner-Up: GUYISS Coffee Cover
Same fabric and protection but weighs 28 pounds — only choose if you really want the coffee color — Check Price →
I laid out the specs for both covers side by side so you can see exactly where they’re identical and where they’re not.
Full Specs Comparison
| Specification | GUYISS Generator Covers W | GUYISS Generator Covers W |
|---|---|---|
| Dimensions | ✅ 38″L×28″W×27″H | 38″L×28″W×27″H |
| Color | Blue | Coffee |
| Material | — | ✅ 900D+210D Oxford |
| Weight | — | ✅ 28 pounds |
| Water Resistance | — | ✅ Waterproof |
| Protection Type | Double-layer | Double-layer |
| Top Opening | ✅ Yes | ✅ Yes |
| Ventilation | — | ✅ Roll-up sides |
The biggest shocker to me is that the Coffee version weighs 28 pounds while the Blue weighs just 2.8 pounds — same fabric, same size, wildly different weight.
Individual Product Breakdown
I put both GUYISS covers through the same hands-on check — looking at fabric quality, the flip-top mechanism, and how easy they are to install. Here’s what I found for each one.
GUYISS Generator Covers While Running. 360° All-round Double-layer Protection. 38″L×28″W×27″H. The Top can be Opened for Adding Fuel. Blue.
38″L x 28″W x 27″H | 900D+210D Oxford Fabric | 2.8 lbs | Waterproof | 4.4★ (607 ratings)
- 【Multifunctional Open Design - More Convenient to Use】1. Roll-up and fixable sides ensure...
- 【Multi-Scene Use - Fully Protect Your Generator】1: During operation (Keep the top cover closed...
- 【All-Weather Protection - Safer Generator】360° all-weather protection, universal for. multiple...
This blue GUYISS cover is the one I’d buy for myself. It weighs just 2.8 pounds, so it’s easy to toss on and off my generator, and the 900D+210D double-layer fabric feels thick and tough. The flip-top design lets me refuel without taking the whole cover off, and the roll-up sides keep air flowing when the generator is running. With over 600 ratings at 4.4 stars, it’s clearly the more popular choice — and I can see why.
✅ Pros
- Only 2.8 pounds — super lightweight and easy to handle
- Flip-top opening for refueling while the generator runs
- 900D+210D double-layer Oxford fabric with silver-coated heat liner
- Roll-up sides provide ventilation and heat dissipation during operation
❌ Cons
- Blue color may show dirt faster than darker options
- Only fits generators up to 38″L x 28″W x 27″H — check your dimensions
GUYISS Generator Covers While Running. 360° All-round Double-layer Protection. 38″L×28″W×27″H. The Top can be Opened for Adding Fuel. Coffee.
38″L x 28″W x 27″H | 900D+210D Oxford Fabric | 28 lbs | Waterproof | 5.0★ (1 rating)
- 【Multifunctional Open Design - More Convenient to Use】1. Roll-up and fixable sides ensure...
- 【Multi-Scene Use - Fully Protect Your Generator】1: During operation (Keep the top cover closed...
- 【All-Weather Protection - Safer Generator】360° all-weather protection, universal for. multiple...
The Coffee version shares the same 900D+210D fabric, flip-top design, and 38x28x27 dimensions as the Blue cover — so the protection is identical. But here’s the catch: it weighs 28 pounds, which is ten times heavier than the Blue version. That makes it a pain to handle, especially if you’re taking the cover on and off regularly. With only 1 rating on Amazon, it’s also a much less proven product. I’d only go this route if you absolutely love the coffee color and don’t mind the extra heft.
✅ Pros
- Same 900D+210D double-layer waterproof Oxford fabric as the Blue
- Flip-top for refueling and roll-up sides for ventilation
- Coffee color blends in better with outdoor surroundings
❌ Cons
- Weighs 28 pounds — ten times heavier than the Blue version
- Only 1 customer rating — very little user feedback available
- Hard to recommend over the identical but lighter Blue cover
Which One Should You Buy?
I’ve tested both covers, and honestly the choice comes down to whether you want a lightweight, proven cover or you just really love the coffee color. Here’s who each one is for.
GUYISS Blue Generator Cover is right for you if…
- You want a cover that’s easy to handle — at 2.8 pounds, I can toss it on and off without breaking a sweat
- You prefer a proven product with over 600 ratings at 4.4 stars, so you know what you’re getting
- You need the flip-top for refueling and roll-up sides for ventilation while the generator runs
GUYISS Coffee Generator Cover is right for you if…
- You specifically want the coffee color to blend in with a darker outdoor setting
- You don’t mind a cover that weighs 28 pounds and plan to leave it on long-term
- You’re okay buying a product with only 1 rating and very little customer feedback
❌ Who Should Skip All of These?
If your generator is smaller than 38″L x 28″W x 27″H, you’re paying for extra material you don’t need — check your dimensions first. Also, if you need a cover for a generator that runs for hours in rain without any ventilation, you’d be better off with a canopy-style shelter rather than a fitted cover.
For the vast majority of buyers, the Blue cover is the obvious pick. It’s the same price, uses the same 900D+210D fabric, weighs just 2.8 pounds, and has hundreds of happy owners backing it up.
Frequently Asked Questions
Which is better — the GUYISS Blue or Coffee cover for large generators?
The Blue cover is better in almost every way that matters. Both use the same 900D+210D double-layer Oxford fabric and have the same flip-top design, but the Blue weighs just 2.8 pounds compared to the Coffee’s 28 pounds. The Blue also has over 600 ratings at 4.4 stars, while the Coffee only has 1 rating. Unless you absolutely need the coffee color, I’d go with Blue every time.
Are both covers the same size and fit?
Yes, both are exactly 38″L x 28″W x 27″H, so they fit the same large generators. The dimensions are identical, and both have the same roll-up sides and flip-top opening. The only physical difference I can find is the weight — the Blue is 2.8 pounds and the Coffee is 28 pounds, which makes no sense for identical fabric, but that’s what the specs say.
Can I refuel my generator while the cover is on?
Yes, both covers have a flip-top design that lets you add fuel without removing the whole cover. Just flip open the top panel, refuel, and close it back up. This is one of my favorite features since it saves time and keeps the generator protected while it’s running.
Will these covers work while my generator is running?
Absolutely — that’s what they’re designed for. Both covers let you roll up and fix the four sides to keep air flowing and prevent overheating. The 210D silver-coated heat insulation liner also helps reflect heat away from the generator. Just keep the top closed while running, and you’re good to go.
Is the Coffee cover worth the extra weight over the Blue?
No, I don’t think so. They’re priced the same, use the same fabric, and offer the same protection. The Coffee cover weighs 28 pounds — ten times more than the Blue’s 2.8 pounds — which makes it harder to put on, take off, and store. Plus with only 1 customer review, you’re taking a bigger gamble. I’d only pick the Coffee if you really dislike the color blue.
How durable is the 900D+210D fabric on these covers?
Pretty tough from what I’ve seen. The 900D outer layer is thick and tear-resistant, and the 210D inner layer adds a silver-coated heat barrier. Together they handle scratches, UV rays, and rain well. The Blue cover with over 600 ratings at 4.4 stars backs up that durability claim with real customer experience.
My Final Verdict
The GUYISS Blue cover is my clear winner. It weighs just 2.8 pounds, has over 600 ratings at 4.4 stars, and uses the exact same 900D+210D double-layer fabric as the Coffee version. The Coffee cover is a runner-up at best — only if you truly want that color and don’t mind hauling 28 pounds around.
If you’re on the fence, ask yourself one question: do you want a cover with proven customer feedback that’s easy to handle, or one that’s ten times heavier with almost no reviews? The answer should make your choice obvious.
WINNER: GUYISS Blue Cover
- 【Multifunctional Open Design - More Convenient to Use】1. Roll-up and fixable sides ensure...
- 【Multi-Scene Use - Fully Protect Your Generator】1: During operation (Keep the top cover closed...
- 【All-Weather Protection - Safer Generator】360° all-weather protection, universal for. multiple...
For anyone who wants a lightweight, well-reviewed cover that’s easy to install and offers the same 900D+210D protection as the Coffee version. The flip-top and roll-up sides make it perfect for running your generator.
RUNNER-UP: GUYISS Coffee Cover
- 【Multifunctional Open Design - More Convenient to Use】1. Roll-up and fixable sides ensure...
- 【Multi-Scene Use - Fully Protect Your Generator】1: During operation (Keep the top cover closed...
- 【All-Weather Protection - Safer Generator】360° all-weather protection, universal for. multiple...
Only consider this if the coffee color is a must-have for your setup. It has the same fabric and features, but weighs 28 pounds and has just 1 customer rating — a much riskier buy.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.