LIGHTWEIGHT: Adjustable shoulder straps suit for running, biking, skiing, mountaineering, hiking and ect.
CAPACITY: 12/30 L. There are two small waist pocket to offer more storage capacity. More than one storages for wallet, book, keys, helmet, water bag.
DRINKING WATER SYSTEM: Can be utilized as a drinking bag, suitable for 2 liters of water bladder, special hole design for hydration bladder (now not included).
SECURITY INSURANCE: Buckle with whistle. Reflective strips for secure riding at night.