The carrier can flip 180° down to manage long loads like CCW; Load-carrier’s bottom hinges allow detaching and expanding. Molded top-shell to protect optics, and other breakables; Shell is base for our exclusive HardPoint(R) hardware parts. Large zip pocket on side fits Nalgene bottles, radios, etc; Padded laptop/hydration area in soft molded back panel (fits laptops up to 17"). The back panel has removable luggage trolly-handle strap; When luggage strap is off, loops are left for carabiners, etc. MAIN COMPARTMENT: ~19.3" L x 11.8" W x 6.7" D (30 x 49 x 17 cm); MAIN MATERIAL: Invista(R) 1000D Cordura(R) (Grayman models are Polyester) - PU x2 water repellent coated for superior water resistance.