Designed to aerodynamically fit under the saddle and carry easily accessible items. 3 size options can carry spares or bulkier gear. These bags are secure and quick to remove or attach when your luck runs out! Features Nifco™ nylon quick release, saddle rail buckle. ‘Fast-Fix’ strap allows option for seat post fixing. Reflectives on both sides. Clam-shell style TPU coated YKK™ zip for easy access. Full welded construction. Lightweight TPU / PU Coated 420D nylon material. Tapered aero shaping.