Backpack features: High-intensity lifting yoke for carrying conveniently. Adjustable carrying system makes it possible for users to adjust the backpack to optimal position and reduce fatigue owing to heavy load effectively. Chest belts can adjust distance between the two shoulder straps and strengthen the stability of the backpack. Moreover, it is propitious to breathe. Air circulation groove of up and down directions keep the back pack not sticky to the wear"s back for ventilation and dissipation. The waist belts which are made from high-elasticity epispastics foam can disperse the load to the lumbar area more effectively. It makes the backpack more comfortable. Waist belt frapping system which adopts the form of frapping forward makes the waist belt frapping conveniently. 600D Polyester Canvas Measurement Approx: 30 Litre Liter capacity 45cm height 35cm width 17cm breadth (Front to back) Assessorial bags: 35cm X 15cm X 5cm 1.0 kg weight