Made with the same closed-cell foam as the popular Cashel Cushion™ saddle pads and will not collapse or give the way open-cell foam can. It will not absorb or hold heat. Adjustable nylon straps hold your Cashel Tush Cushion® firmly in place, preventing sliding and shifting. The Tush Cushion® does not interfere with your balance and seat in the saddle; it just makes it much more comfortable.