Stay cool on the trail without slowing down with the HydraPak HydraSleeve Insulated 3L Reservoir. This leakproof and freezable hydration sleeve is constructed with an insulated foam layer with a thermal reflective liner to keep your water at an ideal temperature for longer. The Shape-Shift feature includes an adjustable baffle that maintains a low profile when filled and unlocks to access the full reservoir volume. The flexible HydraFusion drink tube insulates in hot weather and offers protection in tough conditions. Leaking is no worry thanks to the waterproof nylon ripstop fabric and the High-flow Blaster bite valve that seals after each sip. A dirt guard protects the silicone bite valve from collecting dirt and debris, so you can continue experiencing the freshest water throughout your hike.