Durable & Breathable Material: Crafted from premium waterproof & wear-resistant polyester, this hydration backpack shields your essentials from rain, splashes and sharp abrasions. The lightweight breathable mesh lining enhances air circulation and moisture-wicking efficiency, delivering all-day comfortable wearing experience for long outdoor trips

Multi-Pocket Design: Featuring a multi-pocket layout, it facilitates convenient storage of personal essentials. The inner water bladder compartment is crafted with aluminum film for insulation, leak-proof and waterproof. The two front chest pockets offer safe and easy storage for your gear and valuables. A rear helmet buckle for secure, one-click helmet attachment

Detachable & Adjustable: The hydration vest backpack equipped with widened, thickened and extended adjustable shoulder straps and a waist belt, effectively alleviating shoulder and back pressure. The detachable buckle design enables easy on/off, and the ergonomic fit ensures superior comfort even during prolonged wear—perfect for adults of all body shapes

2L Water Bladder System: This running hydration vest comes with a 2L food-grade hydration bladder (100% BPA & PVC free). The bladder's high-flow bite valve allows on-the-go hands-free hydration, letting you sip water effortlessly while running, cycling or hiking without interrupting your activity

Reflective Safety Design for Outdoor: Ideal hiking water backpack for running, marathons, mountaineering, hiking, cycling, travel and all outdoor adventures. Designed with front & rear reflective markings that boost visibility in low-light/nighttime conditions, maximizing your safety during evening or early-morning outdoor activities