Giving the trail a thrashing while your gear is flopping around on your back like a family of wild ferrets doesn't add much joy to the flow session you set out to enjoy. With single day riding and exploring in mind, the USWE Vertical 10L Hydration Pack supplies just enough stash space for essential gear like clothing, snacks, and first aid kits, but not so much that the contents throw off balance at every root garden. Holding contents closer to you, the Vertical's NDM Race Harness hugs the torso with comfortable mesh straps that add breathability for charging hard down the single track under blue, summer skies.While loaded with features, the Vertical is not a mixed bag, as the internal macro and micro pockets provide expert organization opportunities to help you look like a pro when bailing out the friend who misplaced their multi-tool. A two-liter Hydrapak Elite hydration bladder slots into a separate, compressive sleeve -- for extra control -- and the tubing connects to the Plug-N-Play coupling for quick operation between the switchbacks.USWE sets you up for on-foot adventures as well with trekking pole attachments. And should your quest send you off the beaten path and into the evening, reflective elements aid visibility and LED-light attachments hold your blinkers and lighting gear to brighten your way.The Vertical fits torsos 84-110cm in circumference.