With Its Upgraded Leak-Proof Design And 2L/3L Tpu Water Bladder, The Zacro Product Features 2L TPU Leak-proof Hydration Bladder: Hydropack includes a 2L water pouch made of food-grade TPU material, ensuring it's 100% BPA-free and a switch valve and cover cap make it double leak-proof. With a 3.5-inch large opening, making it easy to add ice and clean. Ergonomic customized Design: The padded shoulder straps and mesh back pad are highly ventilated and breathable. Its low-profile athletic cut with full adjustment fits all body types comfortably. Also, the adjustable waist strap secures the pack snugly in place, provide you to customize the fit for maximum comfort. High-quality Material: Crafted from high-density nylon material and robust SBS zippers, Zacro hydration pack excels in outdoor durability. It is not only scratch-resistant, but also effectively repels rain. Additionally, the backpack features reflective strips to enhance safety during night travel. Well Organized Space: Water backpack bag for hiking boasts a generous 12.5L capacity, providing ample room for all your essentials. It features multiple compartments to keep your belongings organized and secure, with functional and separate pockets ensuring everything stays in place. Compact Ultra-lightweight: Runner backpack is tailored for cycling,running, hiking, trail, camping and even music festivals. Weighing only 8.5oz, it's compact and lightweight, ensuring comfortable wear throughout entire trek,also a practical gift idea for men and women. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!