• Note: the seat rack is not included. • Suitable for mountain and road bikes with a seat post diameter of less than 31 mm. • Soft cover that provides greater comfort and health when carrying passengers; firmly attaches to your bike seat. • Facilitates the transport of your gear and offers a comfortable seat. • Ideal for taking your children or friends on weekends and enjoying your free time. • Extra wide anatomical seat with universal mounting system compatible with most mountain bikes. • Quick release design with velcro for quick installation and removal. • Material: thick sponge. • Color: black. • Size: 36.7 x 17 x 4.5 cm.