Just got a new hot tub and a neighbor suggested this product to save the hot tub lid from getting damaged from the hot sun. Glad I did. Nice thick canvas. I think it's been on for 2 months and there may be a little sun damage to it ----- but it sits in the sun all day and is protecting the lid. I leave it on even when opening the hot tub. When closing, I just reach my hand up and around the sides to be sure the hot tub lid flaps are where they belong. I'd buy this again.Out the box I could tell it was thicker than green tarp I have on my bar b que. As far as being water proof I threw a bowl of water on it as you can see per photos it beaded up. My hot tub measured 80x80 so I purchased the 80 x80 fit perfect. I have the Catalina Armstrong spa. As far as durability time will tell. Will update if any issues arise after this winter.Similar to a quality bbq cover but cinches wit bungee and can be tightened further with straps built-in. Protects more expensive vinyl cover and should last several seasons. Insurance for tub covers which can cost 20 times more to replace.Good fabric denier Andean. Fits very well.It fits great on my new hot tub!!!I was worried the cover material would be thin, but it’s thick and heavy duty. Not too heavy that you need two people to install, but heavy enough that it should last a few years.Very good and perfect for my hot tub. The only downside that color changed from Sun, but it’s ok, that didn’t change its durability. I highly recommend this product.The cover was an easy and economical alternative to ordering a replacement spa cover. It seems to be easy to remove and recover when we want to use the spa. We are happy with our purchase.