I ordered this to protect my kayak from sun and rain when stored outside between uses. It has proven to be waterproof. It's easy to put on, and fits well. I like it. I have only been using this for about two weeks, so I cannot speak to its durability beyond that.I ordered a different brand of cover for two other kayaks. They were slightly more expensive, and were noticeably heavier and more substantial than this one. I like them better, and that is the only reason I gave this four stars rather than five.The blue cover in my photo is the 2.6-3m/8.5-9.8ft size on a 9.5 foot Perception Swifty Deluxe kayak.