Waterproof Climbing Backpack 40L, Upgraded and enhanced version: main bag width 39cm, thickness 23cm, height 51cm, about 45 liters (L) 
Material:
Fabric: 600D encrypted Oxford water repellent fabric.
Lining: 420D nylon lining.
Webbing: High pressure is stronger than nylon webbing, high tension, no break, and good hand feeling.
Buckle: high quality, cold resistance, wear resistance, smooth combination, beautiful shape.
Zipper: high-end silent zipper