INNOVATIVE DUAL HYDRATION SYSTEM: Running vests are equipped with an independent hydration bladder compartment, allowing you to drink directly through a straw, ensuring you stay hydrated at any time during your run. The design is also sturdy and prevents swaying, ensuring a quiet and undisturbed run.MULTIFUNCTIONAL LAYERED STORAGE DESIGN: The main compartment of the hydration vest running can store clothing and first aid supplies, the hidden zippered pocket protects valuables such as mobile phones, and the open front pocket makes it easy to quickly access energy supplies and sunglasses, meeting all the needs of long-distance sports.COMPREHENSIVE SAFETY AND VISIBILITY: The hydration backpack features reflective markings and stripes on both the front and back, significantly improving visibility at night or in low-light conditions. The running water backpack makes outdoor activities such as running and cycling safer and more reliable.ERGONOMICALLY ADJUSTABLE STRUCTURE: The running bags are unisex and feature adjustable shoulder straps and double chest straps to fit different body shapes snugly. The running water vest effectively reduces swaying and friction during running, improving comfort and stability during exercise.LIGHT WEIGHT AND BREATHABLE PROFESSIONAL MATERIALS: The running pack is made of ultra-light weight and abrasion-resistant nylon, with breathable mesh covering the back and shoulder straps to promote air circulation and quick sweat wicking keeping the back dry and cool. The hydration running vest is for a variety of high-intensity outdoor sportsSpecifications[Product Fabric]: Water-repellent fabric[Suitable Occasions]: Sports, running, travel, cycling[Product Colors]: Black, blue[Product Dimensions]: Width 22cm, Height 39cm, Thickness 5cm[Product Weight]: 0.17 kgColor: BlackMaterial: Polyester+NylonPackage Contents:1*Running backpack1*1.5L water bladderOnly the above package content, other products are not included.Note: Light re