NW Survival hydration backpack is the ultimate tool for any outdoor adventure. Each pack comes with an extra-large 2-liter water bladder with easy open cap. Each bladder has a long water Hose with a shut off valve on the end. Each back pack is designed with adjustable straps and ventilated shoulder straps to reduce sweating. Our hydration pack has a big storage pocket to hold any items from food, extra water, keys, headphones, tools, and much more. Northwest survival backpack is lightweight and perfect for hiking, biking, camping, or a walk in the Park..