2The ULTIMATE Pack. Pocket for full size hydration bladder. Flex Seal YKK Zipper keeps optic equipment clean and dry. Internal  dividers can be adjusted to accommodate lens and camera adjustment. Supports a full size body camera, telephoto lens, standard lens and other  equipment. Can be worn as regular backpack or attached to VF-3 Drag Bag. Designed for the best by the best. 1000D Cordura, exterior pocket.