If essentials are all you need to carry, get a pack that doesn?t leave a cavern of air after you stow your water, tools, helmet and windbreaker. TOOL POUCH won?t weigh you down during long excursions, yet it includes premium features like the B.O.D.E.? bag by Polar Design ? a hydration system that minimizes your cleaning regimen by inhibiting bacterial growth. It?s just one aspect of a pack built for convenience and comfort. For optimal efficiency, we added extras like a stretch lash for your helmet, a holster for your mobile phone or media player, and internal organizer pockets.