Storage: Multiple pockets to store gels, towels, keys and that superb dedication! Hydration: A 1.5L main compartment with side pockets for all your water bottles! Optimal Comfort: Align your back, protect your muscles and stay comfy while you're running towards your dreams! Feather-Light: High-quality nylon material for extra softness during extended wear. Safety First: Reflective trim and strap clips for ease and nighttime visibility during those late adventures. 5L Backpack: Get a 5L lightweight running hydration vest backpack! 5L Lightweight Running Hydration Vest Backpack | Living Social | Living Social