with a Size of 11 Inch Length, 7 Inch Width, This Bicycle Seat Cover is Made of Memory Foam & Gel Padded Material to Better Protect Your Buttocks While Riding. No Need to Replace the Whole Seat, You Can Simply Use This Gel Bicycle Seat Cover. the Soft Gel Cover & Drawstrings Underneath Ensure Easy Installation Without Any Tools-just Put the Seat Cover Over the Seat & Secure the Drawstring & Straps, Which Effectively Prevent the Cushion From Sliding During Riding. It Also Comes with a Waterproof Cover, Which Protects Your Bicycle Seat.