The Lowepro Pro Trekker 450 AW Backpack is designed to fit 1-2 Pro DSLRs with lens attached 4-6 additional lenses 2 flash tripod 15 inch laptop plus accessories. The ultimate big-glass expedition camera backpacks built to deliver uncompromising protection & comfort. Built for durability the bag is made from high-density 630D Oxford nylon & has a 1000D Cordura base. The Activ Lift System Harness for load-lifting support is ergonomic & breathable & transfers weight from your waist to your hips for added comfort. You can also adjust the length to your torso. For extra support & storage the backpacks removable lid doubles as a waist beltpack with multiple pockets & a mesh-covered back.