It will fade considerably in the sun
919427
Beautiful next to our pool but it does fade with the direct sun in Arizona!  Been only 2 1/2 months, and it's very washed out in color.  The one under our two-person swing that has an attached umbrella is still vibrant.  Because it is advertised as Fade Proof and it's not, I'd stay away from purchasing this if it's going into direct sun light.
4314623
I live in Southern California and purchased this cover less than three months ago. It fits well and remains water repellant, but the color has faded badly. The sides are a bit lighter than their original brown, but the top and front have faded to a VERY light tan - almost white. The cover looks several years old and I'm embarrassed to have friends see it on unannounced visits. The chair it covers - which sat uncovered for 4 months prior to this purchase - is made of Sunbrella material and has not faded at all. If it weren't for the fit and water repellant properties, I would rate this product 2 stars.
2199708
problem is it doesn't stick for very long in the hot sun.
1179954
The cover fit well and is of reasonably good quality material. The only problem is that it faded to gray within 30 days in those areas that took full sunlight. If you can live with that, OK. I would not buy this again.
1360782
Decent quality on the initial build, however it fades quickly (even not in direct sunlight).  Also, looks like it will only last a year or two before needing to be replaced due to weather deterioration.  I was hopeful it would be a more durable material.

Sadly, people still knock at the door.
4608735
I was happy with the flag while it lasted, it just did not hold up very long to sun abuse.  I did not leave it out all the time but even bringing it in during rough weather didn't prevent the quick fading.  I only got 1 or 2 seasons of use out of it before it was significantly faded.
1460941
After a week outside it had noticeably faded in color. After several weeks, it is almost white.
(Not related to quality; we used this to make a wind sock. It is too lightweight for that application)
2820245
It is cute, and it works, but yes, ONLY in direct sun. If this thing had a battery, it would get 5 stars. Otherwise, the use is very limited to sunny days and sunny spots.
1461816
A little challenging to install but looks, stays in place, and works well. However, fades and then begins to disintegrate within a year in Florida's hot sun and heavy rainfall.
4919840
Used outside, at my patio door.  The sun caused the colors faded dramatically after a year or so, and I had to replace it.
3706373
This cover was a replacement for an original Weber cover that didn't last very long. This is a heavy grade fabric that withstands the weather pretty well wind and rain. The only issue I have with it is that the fabric that is used does not have a UV stabilizer in it. The cover faded very quickly and doesn't look as nice as it should for the short time I have had it. The area that is exposed to the sun has faded into a medium grey. That is why I am giving it 4 stars instead of 5.
UPDATE: adjust the rating to 2 stars. I do not have it out side over the winter, only spring to fall on my patio. After one year of use it is in the garbage can. The fabric didn't hold up at all. the fading was really bad but I can deal with that. Finally the handle on top of the cover that is designed to assist in lifting the cover off was more durable than the material surrounding it. As I lifted the cover off with the handle, a large hole was created. I'm going to try another cover mfg.
2790920
I've had this product for one year. The material is much lighter-weight and easier to maneuver than the older Weber grill cover I had. The bad aspect of this new one is severe color fading. The side of the grill cover that gets sunlight has faded to a splotchy light gray color. I never had that problem on the older, heavier material, but the older material did get 1-inch to 2-inch holes in it, either from weather or from squirrels damaging it.

The new product covers the grill, but it looks terrible. I'm within the warranty period, but the warranty specifically excludes color fading. They must have known it was a problem.
1742242
It's really thin so you get what you pay for.  It also won't last in the sun.  I've used if for two months and it already disintegrating.
951087
Its not bad but it does have a very obvious dark line in it where it was folded in the packaging. This is very visible when the sun is shining on the shade.
4650859
The material is thin and transfers heat from the sun. I don't know how much UV protection it provides. The seat on my Jet Ski was too hot to touch on a clear sky 75 degree day. The cover leaks water. I had to silicone the zippers and spray the cover with Camp Dry to stop the leaks. The cover seams to resist mildew. I park near trees and no black spots have appeared yet. The cover fits well if order the correct size. It has very nice appearance, especially after spraying it with Camp Dry.
376125
We liked this umbrella except for the fact that it sun faded quickly. Nevertheless it has been found to be quite serviceable.
4567835
It'll get a job done but it's not true black under sun. In heat, bubbles form on the surface.