• Water Bottles Included: Comes with a 500 ml soft flasks; made of BPA-free TPU material; leak-resistant and pressure-tolerant for reliable hydration during outdoor activities
• Adjustable Fit for Men and Women: This hydration backpack features adjustable chest and waist straps to reduce bounce; wide mesh shoulder straps provide comfort and stability for jogging, marathon, or cycling
• Ultra-Light and Breathable: Weighing under 6.7 oz, the hydration pack backpack uses breathable mesh on the back and straps; keeps you cool and dry during summer running or endurance training
• 8 Functional Pockets: The hydration vest pack backpack includes front pockets for soft flasks, gels, phone up to 6.1 inches, and keys; rear pocket holds a water bladder or lightweight jacket; perfect for organized outdoor gear
• Versatile Use: Ideal as a black running vest for man, hiking vest, jogging vest, or water vest for running; supports marathon training, trail running, cycling, and outdoor sports with reliable hydration access