The Vargo Ti Arc CF titanium external frame backpack combines the best features of internal and external frames for an unparalleled support to weight ratio of any pack. At its core, the titanium alloy frame features an ergonomically designed lumbar plate to provide excellent load transfer to the hips with sag free comfort. Ventilated mesh shoulder harness is fully adjustable for various torso lengths. Cuben Fiber provides strength, durability, and tear resistance at the lowest possible weight. Let less come between you and your adventure.