- Lightweight and Comfortable: Constructed from durable 800D oxford fabric, this hiking water backpack is dirt-resistant, waterproof, wear-resistant, and scratch-resistant. The soft padded back panel prevents skin irritation during your activities. Adjustable shoulder straps ensure a snug fit to minimize movement, making it an ideal choice for running, biking, hiking, or any outdoor adventure. - Refreshing Hydration: The backpack features a hidden Velcro pocket that holds a 3-liter water bladder. With a large screw cap, it's easy to add ice and fill with water, ensuring your drink stays cool. The leak-proof design is essential for outdoor enthusiasts, keeping your hydration secure even in warm conditions. - Intelligent Design & Practicality: An extendable hose from the shoulder pocket allows you to drink directly from the bladder using the bite valve, facilitating easy hydration on-the-go. You can stay refreshed without removing the backpack, reducing disruptions during your activities. - Versatile Outdoor Companion: This small and lightweight mountaineering backpack is perfect for various terrains. It's suited for hiking, biking, camping, music festivals, carnivals, kayaking, and more, catering to diverse outdoor enthusiasts. The water bag backpack also serves as a thoughtful gift for those who love outdoor activities.