Topeak Elementa Seatbag Description: The Topeak Elementa Seatbag is an ultra-compact saddle bag that fits neatly underneath your saddle with a hook and loop fastening strap. It's large enough to carry the essential inner tube and tire levers. Anti-slip fabric provides mounting security so you won't have to worry about losing any of your carry-on items. Features: Size S can hold up to a 700 x 50c inner tube and two tire levers, while a size M can hold up to a 29x2.5" inner tube, two tire levers, and a CO2 cartridge or mini tool Hook and loop strap mounts easily to saddle rails 1000D Polyester is water repellent and stain resistant Specifications: Pack Type: Saddlebag Pack Capacity: 0.3L (Size: S), 0.5L (Size: M) Mount: Hook & Loop Strap Waterproof: Water-Resistant Material: 1000D Polyester Dimensions: 4.1 x 2.8 x 2.2" (Size: S), 5.3 x 3 x 2.2" (Size: M) Color: Black Weight: 47g (Size: S), 54g (Size: M)