Features: Conform to hip shape, not affecting pedaling; Ergonomic design, and perfectly fit for hip; Comfortable and air permeable, help release pressure; Built-in drawstring , simple to install, and no skidding; Specifications: Material: high density sponge and polymer Product name: 3D Soft Cycling Bicycle Bike Seat Cover Cushion Application: outdoor cycling Features: comfortable, air permeable and durable Color: Black, Blue, Red, Orange Size: 275 X 170 X 20mm/10.8 X 6.69 X 0.79"   Net weight: about 38g  Packages:  1 X 3D Cycling Bicycle Bike Seat Cover Cushion