Shock absorption: Under the four-corner spring shock-absorbing design, the metal spring is more comfortable and has strong damping force, which is not easy to be damaged. Durable and Breathable: Durable leather has the function of abrasion resistance. Rolling without damaging the pants, it is more breathable and dirt-resistant with a long service life. High-elastic sponge: The built-in padding is the high-density sponge, it can make your ride more comfortable. Larger seat space: narrow front and wide rear. The front end is narrowed and both sides of the rear end are widened to increase the side seating area. Unique Design: Dedicated armrest design. It is specially designed for children in the back seat, which is safe for driving. Product Information Size:02 Technical Material Leather Product Size:02 Features: Style: Thickened Four-Corner Spring A/B Size: about 30*21*8cm/11.81*8.27*3.15in Color: Black Application: Some bicycles, electric vehicles, tricycles, etc. Seatpost bracket: approx. 2.0-2.5cm/0.79*0.98in Product weight: approx. 1100 g Material: steel frame base, high elastic sponge padded cushion Packing list: Four-corner spring bicycle seat cushion *1 Notes: Due to various factors such as brightness of monitors and lighting effects, the actual color of the product may be slightly different from the image on the website. Thank you for your understanding. Due to manual measurement, there is tolerance in the product size.