All carbon fiber seat，best material for bike seat ,Structure of arched carbon fiber, light, firm and shock absorption,Ergonomic design,Ideal for remote mounting. Specifications:Matte/glossy Color: Black/blue /yellow/Red Material: Full carbon fiber Item size: 275 * 143 mm / 10.8 * 5.7 in Item weight: 117 g +/- 5 g / About 4.16 oz Packages list: 1 * seat Our guarantee: We are totally obsessive about quality and customer service – if you have any questions please get in touch and we will do everything we can to solve them. Thank you for reviewing my products and hope to serve you！