In the vast and diverse world of foam, Dry Fast is really one-of-a-kind. It’s one of the most porous foams available on the market. Foams can be destroyed by being left outdoors during even a single rainstorm. However, Dry Fast foam doesn’t work the same as most foams. Its water-resisting capabilities make it popular among boaters and for other outdoor uses. http://www.siliconepillows.com/foam/quick-dry-foam/