Hydration packs are the perfect accessory for any serious hiker or outdoor adventurer. A hydration pack is essentially a backpack with a reservoir to keep water. Using a long straw, you can take sips from the pack without using your hands, or having to stop and search through your pack for a drink bottle. The Outrak 3L Vapor Hydration Pack is a high quality hydration pack perfect for any outdoor adventurer. With a 3L capacity, this pack can hold enough water to keep you hydrated throughout your journey. You will love the lightweight construction and padded back panel, ideal when walking or exercising. Use the large storage compartment to store your food and safety gear, and keep smaller accessories such as keys and sunglasses in the smaller front pockets.