MaxMaxi Outdoor Waterproof Assault Pack Tactical Backpack 600D Nylon Rucksack Military Pack Hiking Trekking Camping Bag 55L High density WATERPROOF Polyester fabric 55L-Rugged 600 Denier Polyester construction with PVC lining. You can add on additional pouches and other tactical gear. Multiple exterior and interior pockets for organized storage. Way to Use: Dual shoulder, single shoulder, hand carry or waist hanged. With ergonomic design, the straps and back are permeable and soft. It is ideal for wild adventure, tactical use, outdoor sports, etc.