Bike Saddle Size: Extra wide bike saddle-L9.5inch*W11.5 inch; Backrest-W7.75inch*H7inch. Suitable for most standard 7/8 seatposts of most kinds of bikes and Unisex Adult tricycles, such as mountain bike, road bike, folding bike, commuter bike, cruiser bike etc.

Adjustble Height of Backrest: The backrest height can be adjusted as needed, and the adjustable length is 4.5 inches.

Material: Premium material waterproof PU cover, stainless steel rails make durable use, high-quality foam and gel padding vacuum make it most comfortable.

Good Shock Absorption: With thick bike seat padding and dual spring suspension, it makes the best shock absorption.

Easy Installation: Comes with installation tools and instructions for easy installation.