Seam welded! to keep water out and provide maximum protection for contents. Designed to make full use of the space under the saddle, eliminating the need for a rear rack. Constructed from high quality, waterproof materials and optimized for durability and weight. - Three-point seat attachment system made from anti-slip hypalon, for maximum stability and rider comfort - Hands-free air release vent for hassle-free compression - Roll-top closure with dual compression straps to protect gear and to provide flexible packing capacity - Bungee cord tie down feature for added storage - Reflective graphics to enhance rider safety - Two bike light attachment points for enhanced visibility - Compact size; ideal for endurance road racers, randonneurs, commuters - Capacity: 9L - 325g Note: this pack is designed to keep water out, even in a sustained rain. It also features an air release vent and is therefore not submersible.