Water & Scratch Resistance Fabric – The 40L lightweight Water & Scratch resistance solid multifunctional backpack with high quality durable YKK zippers and buckles for combat, survival or hunting. It’s versatile for school, carry on for travel or a military tactical assault rucksack for men, women, boys and girls. Massive capacity with Anti Thief back pocket – Main storage (Quicker zip access on backside) with elastic drawstrings on top for extra space expansion. A Padded internal pouch with adjustable strap in the roomy main compartment for laptop (up to 15"). The Anti-Thief back pocket on right hand side to protect valuable belongings. Front pocket with extensive applied space for tools, cards and electronic products. The two side expansible elastic pockets for water bottle or retractable alpenstock. MOLLE Webbing– The MOLLE expansion system designed for extra hiking gear attachment or combine equipments (such as loading pockets, water bottle bag, accessory kits) as 3 day assault pack backpack, bug out bag backpack, trekking backpack or camping hiking backpack. Breathable Mesh Shoulder Straps – The adjustable widened and thickened S-type mesh shoulder straps with chest clip work comprehensively to distribute the backpack’s weight with steady and centered. The breathable back support provide finest ventilation and easing burden. Laptop Compartment – Padded internal pouch with adjustable strap in the roomy main compartment for your laptop (up to 15") or any tablet.