16"-18" Wide Exercise Bike and Bicycle Seat Gel Pad - Rowing Machines Too - Extra Large Pad / 1-1/4" Thick Luxury Gel Fits bike seats that are 16'' - 18'' W and 16'' - 18'' L 1 1/4'' thick whipped gel padding provides unparalleled comfort and durability Adjustable drawstring skirting on pad ensures secure fit on bike seat Rubber material underneath pad creates non-slip surface on existing bike seat Slight anatomic relief zone provides groin, perineum, and tailbone/coccyx area pressure relief