If you're looking for a lightweight, durable hydration solution to wear around your waist, the Hydration Core is just right for you. It includes a 1.5-liter HydraPak reservoir and a bite valve, plus a magnetic clip that comes with the drinking tube to keep it in place.The 3.0 liters of storage space will give you enough room for your essentials, with extra pockets on the waist belt.The AirLine back ventilation ensures sweat is kept to a minimum, there are also 2 stretch mesh bottle pockets and it's one size fits all!If you're looking for greater tool capacity, check out the Core 2.0 tool belt.