UTOBEST Running Vest, 5L Hydration Vest Lightweight, Breathable And Sweatproof Running Backpack Adjustable Running Hydration Vest For Trail Running Marathon Race Jogging Cycling Color Black Vest 5l With 1 5l Bladder&pid=ngvmywrjzj The runners vest suits for chest size 31., 5-47., 3 inch , 1., 5 L BLADDER INCLUDED: 1., 5 L food-grade TPU bladder for safe, BPA-free hydration. Crafted from breathable and sweatproof fabric, this vest keeps you cool and dry, enhancing overall comfort during intense workouts or long racing events... Hydration backpack hiking Leakproof connection ensures effortless use. UTOBEST Running Backpack, 5L Hydration Pack, Lightweight, Breathable For any inquiries or issues, feel confident reaching out to us—we're here to assist you on your journey WORRY-FREE SUPPORT: UTOBEST ensures enduring service quality. Lightweight 5L running backpack with 1.5L TPU water bladder. Made of breathable 3D mesh stretch fabric, weighs only 250g. Includes multi-pocket design and adjustable straps The backpack fits different running distances , 0., 5 LB ONLY with TUBE BUCKLE: UTOBEST hydration pack is incredibly light, nearly weightless, you don’t even notice there is a running water vest on your back. ERGONOMIC ADJUSTABLE FIT: UTOBEST running vest hydration adjustable strap design for easy adjustment and outstanding stability, reduces bounce and ensures a great fit while running. The water backpack features high-quality nylon fabric, YKK zipper, and Duraflex fastener, ensuring stability and durability