OUTGEAR Tactical Military 3 Day Expandable Combat Rucksacks Backpacks with Grenade Survival Kit For Hiking Climbing Shooting Hunting Camping Outdoor Sports Size: 20 1/2" x 15" x 7 3/4"  12 3/4" (WHEN FULLY EXTENDED). Hold up to 3920 cubic inches Capacity. Heavy-duty 600D Polyester Material, and Water Resistance. Excellent for Tactical, Survival, Law Enforcement Gear, Hiking, Sports, and Daily purpose. All OUTGEAR Military Tactical Backpack comes with Grenade Emergency Survival Kit. Constructed of 600 denier polyester with vinyl backing, and Water Resistance. Large expandable main packing compartment. External Molle Loops allow additional pockets to be attached if necessary. Multiple Colors for Selection. Water resistance. This military tactical backpack is designed for Tactical, Survival, Hiking, Law Enforcement Gear, Sports, Hiking, and any Outdoor Sports Purpose. Side parachute clasps, Easy grip zipper pulls, back support belt with parachute clasps, and Back support belt. Ready for any Military Tactical, Survival, Hiking, Law Enforcement Gear, Outdoor sports, and travel mission. Extra-Large, expandable main packing compartment. Main area expands from 5 to 10 to fit more gear. The bag with 3 compartments for different function, and an organizer pocket has several mesh compartments built for smaller accessory storage. It designs for military tactical, hiking, travel, camping, hunting, school backpack, Law Enforcement Gear, daily and any other outdoor Military Tactical Sport Activities. OUTGEAR Tactical Military 3 Day Expandable Combat Rucksacks Backpacks with Grenade Survival Kit For Hiking Climbing Shooting Hunting Camping Outdoor Sports. Quality is guaranteed.