Stress points in the bag are double stitched, bartacked or Box-and-X stitched for added strength. 600D high-density Polyester pack with massive main area. For additional storage, D-rings on the shoulder straps and a front stash pocket for helmet/jacket. Uses PALS webbing grid system to attach the MOLLE pouches. Concealed hidden compartment, padded pockets for a 15 laptop and tablet, 2 quick access pockets and secondary zippered pocket with organizer. 3L hydration compatible. Ergonomically designed with padded, curvaceous backpack straps, sternum support, and soft, breathable back padding and waist strap padding.