OMM Ultra 12 Running Backpack - SS19 LeanWeight Chassis - A light weight is achieved without strength loss. UGR - Universal Gear Rail - A strap located across the bag allows for easy storage of items such as ski poles. Lightweight Mesh Yolk Shoulder Harness - Adds extra comfort and breathability. OTMA (On the Move Accessibility) - Gives you speed and efficiency on the hill. All your items are where you want them, when you want them, and the leanweight link system is what gives the product these benefits. The OMM leanweight link system has 4 discreet or semi hidden link points on almost all packs. Removable Back Padding - To achieve Leanweight.