About This BUILT FOR MARATHON & TRAIL TRAINING: This 10L running hydration vest is designed for runners who go the distance. With front quick-access pockets, secure zip storage, and trekking pole loops, it keeps your essentials organized during long runs, race training, and weekend trail adventures Fits 2L Hydration Bladder(not included): Compatible with 2 L bladder, supports 2-4 hour trips. Hydration backpack for hiking features a separate bladder compartment, hanging system, and front flask pockets for easy hydration and balance on the run LIGHTWEIGHT, BREATHABLE & BOUNCE-FREE: Made from ultra-light nylon and ventilated mesh, this running vest stays snug without restricting movement. Designed to minimize bounce so you can focus on pace, distance, and performance ADJUSTABLE FIT FOR ALL BODY TYPES: Dual adjustable chest straps and side adjustments provide a personalized fit. Whether you're looking for a womens running vest or a running backpack for men, this hydration vest adapts to your stride BUILT FOR CONFIDENT MILES: Stay visible with reflective detailing designed for early morning and late evening runs. A built-in safety whistle adds an extra layer of preparedness, while water-resistant fabric helps shield your gear from light rain and sweat. Made to support consistent training in any condition WORRY-FREE SUPPORT: UTOBEST ensures enduring service quality. For any inquiries or issues, feel confident reaching out to us—we're here to assist you on your journey. Overview Brand : UTOBEST Color : Blue (Vest Only) Material : nylon-mesh Sport : Running Item Weight : 0.99 Pounds