The PRO Pack Suspension is built with a heavy haul in mind because often a second trip is not an option. The ergonomic fit of the profile adjustable hip belt adapts and custom fits to your shape – simply tighten or loosen the lower side straps and adjust the lumbar height for optimal feel and an even distribution of weight. We added soft, dual-density foam throughout the hip belt wings and lumbar pad to support the areas that burn most under a heavy load and to increase mobility. The integrated lumbar support is positioned slightly above the belt-wings for added lower back support. Structure is added throughout the loadbearing areas of the belt to eliminate bunching and compression. The lumbar pad has 1.5″/ 3.8cm of vertical adjustability and the option of adding a .40″/1 cm foam insert for a perfectly tailored fit. The completely redesigned shoulder straps are wider and softer for increased stability and comfort. Against your back, the straps are positioned 2″/5 cm wider than previous designs, which adds comfort and minimizes a heavy pack from swaying or rolling as you navigate difficult terrain. The ported open-back design promotes air flow and draws heat away from your body. New next-to-body spacer mesh lining is more durable and breathable than previous designs. Built in T-lock straps offer 4″/10cm of torso length adjustment.