Black Military Rucksacks, Marrywindix Sport Outdoor Tactical Molle Backpack Camping Hiking Trekking Bag (Size fits better for Women and Teens) Chest belts can adjust distance between the two shoulder straps and strengthen the stability of the backpack. Capacity: 30L; Dimensions: (9.45'' x 8.66'' x 16.53'') pls pay more attention to the size Capacity: 30L. Adjustable carrying system makes it possible for users to adjust the backpack to optimal position and reduce fatigue owing to heavy load effectively. The waist belts which can disperse the load to the lumbar area more effectively. It makes the backpack more comfortable. Enhanced back support for ventilation and comfort. It is propitious to breathe. Enhanced back support for ventilation and comfort