As part of the Ortlieb Bikepacking series, this 11 liter pack is a smart piece of gear. The front wraps around the seat post, requiring only 6 cm of free seat tube. All parts that make contact with the bike are reinforced. - Adjustable volume: 7 - 11 liters - PS21R material: fully waterproof, welded seams - Bungee cord on top for overpacking - Four high quality 3M reflectors - Place for a led light - Made in Germany - 5 year guarantee for material and manufacturing flaws PVC-free product.