The HammerSiz boat cushion is the ideal supplement for all boat benches. It is 100% waterproof and ensures comfortable sitting in your boat. It feels a bit like memory foam and its hardness is just perfect. Not too soft so that it doesn’t become flat when you sit on it and not too hard so that it is still comfy. As well the seating area is equipped with an additional rain cover. As well adjustable straps will allow you to mount the cushion on all of the common sized boat benches.