Ideal for adventurers The Ortlieb Gravel-Pack with the proven Quick-Lock3.1 mounting system offers you a generous 14.5 liters of storage space for all your additional gear. This single bag effortlessly withstands the toughest conditions on gravel and rocky trails thanks to its lightweight and abrasion-resistant material. Even adverse weather can’t harm your gear because the bag is equipped with the proven Ortlieb roll closure guaranteeing absolute waterproofness.