A large capacity seat bag specifically designed for bikepackers wanting a streamlined way to carry gear without the need for a rear rack. The reinforced anti-slip/scratch fabric protects the saddle while the advanced mounting system enables convenient and secure mounting to seatpost and saddle rails. Easy access waterproof carry bag and built-in air release purge valve keeps bag compact and dry while you’re on your next adventure. QUICK HOLSTER ATTACHMENT Install / remove waterproof carry bag quickly and easily MINIMUM CLEARANCE L1 > 23 cm / 9“L2 > 13 cm / 5.1” AVAILABLE IN 2 SIZES 15 L / 915ci 10 L / 610ci BUILT-IN AIR RELEASE VALVE Built-in Air Release Purge Valve purges extra air to fully compress the load WATERPROOF CARRY BAG Keeps contents dry and easily accessible NIGHTTIME SAFETY Attach rear light to the strap for nighttime safety OPTIONAL ANTI-SWAY BACKLOADER WISHBONE Keeps riding balanced and hold 2 additional bottle cages for extra hydration needs MATERIAL: Polyethylene / Anti-slip PU leather / Nylon / Engineering grade polymer Lightweight durable water repellent and stain resistant  BAG ATTACHMENT: Holster with hook and loop fastener and buckle fastener  WATERPROOF RATING: 10 000 mm waterproof inner bag  MAX LOAD CAPACITY: 5 kg / 11 lb  ADDED FEATURES: Waterproof carry bag Air release purge valve Attachable rear light strap Optional BackLoader Wishbone  SIZE: 46 x 24 x 22 cm / 18.1” x 9.4” x 8.7” 10 L   WEIGHT: 508 g / 17.92 oz 10 L