Ergonomic design, more suitable for the riding. High elasticity, ultra soft PU waterproof surface.Microfiber leather, high elastic seam, easy to wear, ideal if you want to feel smooth and comfortable. High quality steel skeleton,spring support.Cushion made from high quality steel, good elasticity and strength, with tolerance is large enough. On uneven roads can easily be. Polyurethane Gel Cushion with irregular stripes. Convex striped design, more breathable.Inner cushion with thick high-density elastic sponge, good elasticity and high density, and to provide a more comfortable ride. This frame is for the replacement of bicycles and makes it cosy, when you riding a bike lock. Specifications: Color: Black Size: 260x210mm Weight: 690g Material: PU leather + UV high-gloss printing + polyurethane gel foam pad + PP bottom shell + plastic ball shock absorbing spring Package includes: 1pc * bicycle seat Note: 1. Please allow 0-1'' error due to manual measurement. Thank you for your understanding. 2) the monitors are not calibrated same, the color shown in the pictures displayed element may differ slightly from the real object. Please see the genuine as standard.