A unique Widepac™ Pro side sliding closure makes filling, cleaning & draining this 1.5 litre hydration bladder from Source extremely easy. A triple-layer PE lining helps to keep your liquids free of unwanted odour, taste & bacteria for the life of the product, while a Dirt Shield™ valve cover keeps out dirt during transport. Helix Valve™ technology eliminates leaks & spills & allows for quick & convenient hydration when you’re on the move.