Rockbros Cover Bicycle Seat Cushion Size S - BlackRockbros Bike Seat Cushion Cover Size S Black The Rockbros bike seat cover in size S is the perfect solution for any cyclist looking for comfort and stability in a compact format. Thanks to the use of breathable mesh, gel filling and memory foam, it provides exceptional cushioning and comfort during daily commutes or weekend rides. The non slip bottom prevents the cover from sliding, and the wide Velcro strap allows for quick and secure installation.