The Topeak Backloader X 10L is a spacious seat bag crafted for bikepackers who prefer a sleek way to transport their gear without a rear rack. Its reinforced, anti-slip fabric safeguards your saddle, while the advanced mounting system ensures a secure fit to both seatpost and saddle rails. The waterproof carry bag offers easy access, and the built-in air release purge valve keeps the bag compact and dry during your adventures. 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). With the Topeak Backloader X 10L, you can enjoy a hassle-free biking experience, knowing your gear is safely stored and protected from the elements.