Equipped Outdoors 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. Equipped Outdoors backpack is lightweight and perfect for hiking, biking, camping, or a walk in the park! Each hydration pack is backed a by a full lifetime warranty. Extra Large 2 Liter Bladder. BPA Free. Large screw cap for easy water access. Convenient large pocket with a zipper to hold any extra tools, food, or gear. Adjustable straps to fit most body types. Breathable open straps for constant air flow to reduce sweating. Durable nylon material to handle any hiking, biking, or running adventure. Hydration pack is water resistance to keep your belongings dry in any conditions.