Compact Mountain Bike backpack for All Mountain use. 4 stage adjustable back length, load compression ‘Adaptive Carrier System’ adjusts to the shape of the rider. The BA3 offers 15 liters of capacity, with a extra 2 liter expansion. Vertical compartments for protectors, combined full face helmet / wet clothing compartment. Compression straps. Inside the pack has 4 compartments, and a separate pocket for a bladder. The front section and hip strap has small pockets to keep tools, tubes, and a pump organized. A loop on the shoulder straps allows a phone holder to be fitted. The wide, elastic hip strap can be adjusted with a single hand, and has both velcro and standard fastenings to ensure the pack stays put when riding. For increased visibility HiLumen reflectors have been integrated.