Gobike Black Soft Gel Relief Bike Saddle Seat Cushion Pad Cover, Straight and Triangle Groove HIGH QUALITY-Made of anti-slip and wear-resistant elastic lycra material. HUMANIZATION DESIGN-Ergonomic design and univaral size fits for most bike saddles. DECOMPRESS-Deep center relief zone reduce pressure on sensitive parts. NON SLIP MAT-Anti-slip material holds cover in place FAST FBA SHIPPING