The O'Brien Water Saddle is made of a 2" thick 5-ply poly foam that will not deflate, even after repeated use. The Water Saddle allows your arms and legs freedom of movement while you're soaking in the pool, lake, or ocean. Foam material dries quickly for storage. 21"L x 16"W. Great way to cool off in the lake or pool Dries quickly for storage | O'Brien Water Saddle - Orange