This bike seat cushion is designed to provide a comfortable and breathable riding experience for long-distance cycling. It is made of high-quality silicone gel, which can absorb shock and reduce pressure on the hips and tailbone. The cushion is designed with a breathable mesh surface, which can improve air circulation and prevent sweat buildup. The cushion also has a non-slip bottom, which can keep it in place during the ride. This bike seat cushion is easy to install and compatible with most standard bike seats. Whether you are a professional rider or a casual rider, this cushion is a great choice for you. About Installation 1. New double rails seat post,mount the saddle directly with your hex screws. 2.Vintage clamp tube seat post,saddle clamp ring accessories required for mounting,you need to buy the seat adapter conversion clamp,just search in our shop,or contact us. Color:Black Filler:Memory Foam Size:27*17 cm/10.63*6.69 Inch Weight: 430g package includes:one bike seat