Material: iron polyurethane (PU). Colour: black Seat size: 26x30cm. Backrest size: 18x8cm. Total size: 34x26cm With backrest, safe and giving a lot of relaxation. It can be used for electric bikes, tricycles, most beach bikes and road bike saddles. Want to know how a bicycle seat with a backrest feels? Try it!!! You won't regret it. Sit back and lean back while riding on this comfortable bicycle seat with backrest. It is integrated with an adjustable backrest and fits a standard seat post. Ideal for electric bike saddles, tricycles, most beach and road bikes. Ergonomic bicycle saddle The extra wide design is soft and fits your hips perfectly without affecting your leg movement. Our three-wheeled seat increases both the area of strength, hip support and riding comfort. Back support for safe and secure driving Adjustable backrest Wider than typical saddle, seat with backrest supports rider's back and helps reduce fatigue, backrest height can be adjusted to better serve the back, adjustable height 33cm-36cm (12,99in-14,17in), measured manually, can be error, please refer to the item received Stay healthy and stay active Riding a bike on an uncomfortable saddle will make you feel like every bump on the road passes through your spine. Replace your uncomfortable saddle with a bicycle seat that fits your comfort needs perfectly and spend more time outdoors. Safe weight transfer Made of high quality iron material with flexible spring suspension for safety and comfort, the reclining seat is ideal for cruiser bikes, mountain bikes, city road bikes and adult tricycles.