A spacious seat bag designed for bikepackers who want a streamlined way to carry gear without a rear rack. The bag is made with reinforced, anti-slip/scratch fabric to protect the saddle. It features an advanced mounting system that securely attaches to the seatpost and saddle rails. The bag is also waterproof and comes with a handy waterproof carry bag. The built-in air release purge valve helps keep the bag compact and dry during your adventures. The bag is made from lightweight, durable materials that are water repellent and stain resistant. It has a maximum load capacity of 5 kg (11 lb) and comes with added features such as an attachable rear light strap and an optional BackLoader Wishbone. The bag measures 46 x 24 x 22 cm (18.1" x 9.4" x 8.7") and weighs 508 g (17.92 oz).