The Backloader X 15L is a spacious seat bag designed specifically for bikepackers who want a convenient way to carry gear without using a rear rack. Made with reinforced, anti-slip/scratch fabric, this bag protects your saddle while providing a secure mounting system to your seatpost and saddle rails. The bag is also waterproof and features an air release purge valve to keep your belongings dry and compact during your adventures. Made with materials such as Polyethylene, anti-slip PU leather, and nylon, this bag is lightweight, durable, water repellent, and stain resistant. The bag attachment consists of a holster with hook and loop fastener and buckle fastener. It has a waterproof rating of 10,000mm for the inner bag. The maximum load capacity is 5kg or 11lb. Additional features include a waterproof carry bag, air release purge valve, attachable rear light strap, and an optional BackLoader Wishbone. The bag measures 51 x 24 x 22cm or 20.1" x 9.4" x 8.7" and has a 15L capacity. It weighs 525g or 18.52oz. This versatile bag provides a streamlined and convenient way to carry your gear on your next bikepacking adventure.