Stay cool without slowing down. The HydraSleeve insulated reservoir sleeve keeps your water flowing cold. Constructed tough so it can be thrown around outside the pack. The included 3L Shape-Shift reservoir is equipped with performance features, including an insulated drink tube & dirt guard. So go on, beat the heat. a BPA & PVC free a Leakproof a Freezable Specifications: Manufacturer: HydraPak Age Group: Adults Capacity: 3 liters Color: Chasm Black Fabric/Material: BPA- and PVC-free Hydrapak Hydration Compatible: Yes Weight: 10.8 oz