Cashel English Tush Cushion The Cashel(R) Tush Cushion(R) 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(R) firmly in place, preventing sliding and shifting. The Tush Cushion(R) does not interfere with your balance and seat in the saddle; it just makes it much more comfortable. Color : Black Dimensions: 13" W x 14" L