Insulated pocket for hydration bladder (hydration bladder not included) with two Velcro fasteners to attach the hydration bladder. The insulation material keeps food and liquids warm or cold much longer than a non-insulated bag, your drink can be kept cool for up to 4 hours. An outlet and a hose trap on each side of the shoulder strap for the drinking hose. Keep your hose safe and accessible when you need it.