Outdoorsman Lab Hydration Belt for Running with Water Bottles (2X BPA-Free 10 Oz) NO SLIP, BOUNCE, OR RUB with ADJUSTABLE NYLON STRAPS: This Runners Belt/Fuel Belt with super soft, lightweight Neoprene and anti-slip inner layers make sure there is no slip, bounce, rubbing, or chafing while running for the best sung fit. This belt fits most waist sizes (28" to 38") with adjustable nylon straps and strong buckle clip. NO POCKET IN YOUR RUNNING SHORTS? No problem. This running hydration pack fits all smart phones with separate inner pocket and carabiner to prevent scratches from keys. Top zipper makes storing and retrieving you valuables easy and secure. NEVER CARRY YOUR WATER EVER AGAIN: Stay hydrated with easily accessible (2) 10 oz BPA-free, leak-proof water bottles for running belts. Enough even for longer runs, race, hiking, camping,cycling. Great as hiking belts /waist pack. STAY SAFE & ENJOY YOUR FAVORITE MUSIC WHILE RUNNING with easily accessible headphone port and High visibility reflectors. This is especially important for running in the evening or early morning. ENOUGH WATER FOR YOUR RUN: 2 10 oz PBA free water bottles enough for even longer runs