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 Missile Hydration pack is a high quality hydration pack perfect for any outdoor adventurer. With a 2L capacity, this pack can hold enough water to keep you hydrated throughout your adventure. Made from lightweight polyester and polyamide, it will fit comfortably under your hiking or travel pack without adding too much weight. Lightweight mesh shoulder straps and an adjustable sternum strap ensures that the pack is comfortable and secure when in use.