Comfortably carry your hydration and running gear during long trail runs, ultramarathons, hikes and more—the Amphipod PureRun® FreeForm Soft-Tech™ 1.5L Reservoir Vest gives you easy access to everything you need. This hydration pack has a lightweight and breathable fit that gives you complete freedom of movement whether you're running up switchbacks or going out for a day hike with your family. A 1.5-liter Soft-Tech™ reservoir keeps you hydrated during your longer adventures, while a main pocket and five exterior pockets give you six liters of storage to organize and carry all of your running essentials Easily personalize your fit with the Cinch-Fit adjustments for all-day comfort and hit the trails in confidence wearing the Amphipod PureRun® FreeForm Soft-Tech™ 1.5L Reservoir Vest.SizingSize 1: 24-40" chestSize 2: 36-50" chest