Description: Versatile Compatibility: This rear seat cushion is designed to fit bicycles with a rear rack, including mountain bikes, folding bikes, and more, making it a versatile addition to your cycling gear Enhanced Comfort: Featuring thickened sponge padding, this seat cushion provides great softness and comfort for both adults and children during rides Premium Material: Made from quality PU leather and sponge, the cushion is not only soft but also resistant to slipping and wear, ensuring long service life Easy Installation: Come with quick-release buckles, the seat cushion is designed for easy installation and removal, allowing you to quickly attach or detach it as needed without any hassle Compact Size: Available in 2 sizes, this seat pad offers a compact yet comfortable seating solution that doesn't compromise on space or convenience Specification: Material: PU leather, Sponge Size Chart: Medium: L*W*H 31cmx14.5cmx4.5cm/12.20inchx5.71inchx1.77inch or Large:L*W*H 32cmx15.5cmx5cm/12.60inchx6.10inchx1.97inch (OPTIONAL) Package Includes: 1Bicycle Rear Seat Cushion Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.