Features: The bottom of the dual-spring design, high elastic damping Punching high-density foam, comfortable touch Microfiber leather, wear-resistant, anti-scratch Inner layer made of fabric with glue points to ensure no slip . Interlayer made of thick soft foam , comfortable, durable. Put it over your existing seat, cinch it up, and hop-on. Suitable for mountain bike. Surface layer is skid and anti abrasion.