This is a very good product.  However I gave it 4-stars just due to a couple of points: The specs in the website say this is 5" thick however it comes it at about 3.5" in thick.  It may be a 5" thick cushion in a 3.5" sleeve. The material is made of a very dense material and is comfortable.  I have metal supports on mine chaise lounge as opposed to a mesh type design so the thickness of the cushion is important.  I recently purchased a similar cushion from another vendor that was not as dense as this one and ended up returning it because I could feel the metal supports underneath me while laying on it.  I use this product near my pool area so when you lay on it with a wet bathing suit the water seeps through and flattens the cushion down to about 2" but when it dries it bounces back up to its original thickness.  I would certainly recommend this product.