I opened the box and immediately saw the PVC mesh, no way - this stuff comes apart after a year or so in the sun like all tarps and leaves small, plastic flakes or dust from the wear. I'm not even sure what saltwater will do to it with the sun. This might work for those in drier regions as I doubt much water passes through this but it will keep leaves out if kept fairly dry. I would expect to have to replace this every year or so as it will leave visible PVC particles in your water. I put this back in the box, left a review and are returning the item. Don't buy if you just want a large net for your pool in the winter!Awesome, easy to install and very good to keep leaves and other stuff out of the pool.This pool cover does not let water through. PERIOD. It will need to be pumped.Great product just make sure you get the right size before you buy. I just laid my 20x40 mesh on top of pool and with my odd shape pool, I was able to pull and cover other areas. Works greatUnfortunately, it is not as advertised. The water completely puddles over the cover. Removing the cover in the spring was an awful experienced, due to the puddling the cover sunk in the pool making it very heavy to remove. We just put it back on again as we closed the pool yesterday and only with a bid of rain the water is already sitting on it. Awful product. I wish I could return itSmaller than advertised. Came with a couple small holes and cheap stitching. Threads coming out all over.Water sits on top of the cover and the water bags do not hold up very well. This would be best and ideal with pools where you can drive stakes into the ground or cement and really secure.I wanted a mesh cover to let the rain through so I wouldn't have to siphon water off. So far this cover has done that. However, it is terribly made out of cheap plasticy material. It started shedding as soon as I unfolded it and it looked as if a someone has shaken black pom poms all over the patio. It easily tears if dragged across concrete. I like the mesh but will definitely splurge for one that is better made next year assuming this one makes it through the winter.