This wither-free foam pad is made of Memory Foam (high-tech memory foam) and a new material called 3D Spacer. The 3D Spacer material contributes to perfect pressure distribution and prevents heat build-up. It also provides outstanding breathability and moisture absorption. The Memory Foam absorbs shock, prevents friction and ensures even pressure distribution. The special shape of the pad provides relief for the withers area. Machine washable at 30°C in the washing machine or by hand with a mild detergent.