Monstrum Tactical 3 Day Backpack Seven primary storage compartments including a 20 x 14 x 8.5 inch main storage compartment of 2400 cubic inches or 40 liters in volume A dedicated compartment suitable for water bladders or laptops up to 15.6 inches in size The fully adjustable padded shoulder straps and waist harness allow for comfortable fit and balanced load bearing for users of all shapes and sizes Crafted from 1000D heavy duty nylon for resistance to tears and abrasion, with a water resistant lined interior PALS webbed lining for attaching MOLLE pouches and accessories, and velcro strips for attaching customized patches; package includes a free American flag patch