- 1.3L Hydration Bladder : Features a detachable water reservoir with an enlarged filling opening. Constructed from food-grade EVA material, it provides safety for hydration. The wide opening allows for easy cleaning and the addition of ice cubes. The ON/OFF valve controls water flow and effectively prevents leaks. - 2 Functional Compartments : The main compartment houses a 3L/106oz water bladder with a large opening, along with a secondary pocket for the smart tube connection. An additional back pocket is designed to securely store personal items such as your cellphone, wallet, and keys. - Comfortable Design : Equipped with two adjustable shoulder straps and a secure strap to ensure the hydration bag fits snugly against your back, minimizing bounce. This design is suitable for both men and women, providing an ergonomic fit. - High-Quality Material : Weighing just 0.8lb, this hiking water backpack is made from durable 900D high-density Oxford fabric, ensuring lightweight wear resistance. The soft back section offers comfort and breathability during extended outdoor activities. Practical Use Scenarios : - Ideal for hiking, keeping you hydrated on tough trails without the bulk. - Perfect for biking, allowing you to ride hands-free while staying refreshed. - Great for camping trips, providing easy access to water while keeping essentials close at hand.