Anti-Slip Silicone Gel Bicycle Seat Cover with Center Relief Zone and Breathable Layers Cushioned layer of silicone gel is concentrated directly under your gluteus maximus Anti-slip gripping material and drawstrings hold seat cover securely in place Breathable, durable lycra cover holds up to years of heavy use Great for tour riding, bike racing, the gym, and mountain biking Soft, shock absorbent, and easy to use