High quality materials: PU leather + Sponge + 0.8cm wooden board. On rainy days, you don't have to worry about the pad being flooded. Just wipe the surface with a tissue and you can continue to use it. The thick sponge pad is very soft and comfortable. Easy to install: A nice flat and durable bike rack is needed to mount underneath. This bicycle rear seat is easy to adjust on any bike rack, can be used on a standard and universal rear seat for most bicycles. Note: Support for the seat is not provided. Widely Used:This bike rear seat is easy to install on the rear bike rack, universal for most bicycles, such as hybrid bikes, touring bikes, mountain bikes, motorized bikes, road bikes, etc. Comfortable cushion: The soft protective cushion makes carrying people more comfortable, sitting on the bike for a long time will not make you acidCarry your children or your friends on the weekend and enjoy your leisure time not alone