1.Dimension: 45*25*23*cm / 9.45*7.09*3.94in, Weight: 850g /1.87lb, Capacity: 30- 35L. 2.Made of 900D nylon oxford cloth with a water-proof layer and metal zippers for extra durability. 3.It has a roomy main storage area, dual front pockets. Padded and breathable mesh back panel and shoulder straps offer cushioning comfort. Molle external expansion system designed to be used in combination with other equipment, can loading pockets, accessories kits and more. 4.We added extra nylon webbing on top of the shoulder strap instead of directly suturing the strap and shoulder strap, you can adjust the shoulder strap on both up and down to better fit the back and for better decompression. 5.This tactical assault back pack can be used as assault pack, hunting backpack, survival backpack, trekking backpack or for daily use. Please check pic 2 and related videos carefully for specific size information before purchase. NOTE: There may be a little color difference as shown in the pictures.