Hyflo Bite Valve Carabiners The helmet shape is specially

The helmet shape is specially designed for use with ski goggles

the vest wraps closely to the body with stretch fabrics that move with you

Apart from the obvious things being the boxed wall construction and the amazing quality down

Although this seams counterintuitive at first

more compact and has a higher output than before

Hyflo Bite Valve Carabiners The helmet shape is speciallyDescription The perfect replacement for any old and wearing bite valves on your Platypus branded water reservoirs! It's a streamlined, one piece bite valve offering a high rate of water flow and is completely leak free and self sealing! The Silicone material is medical grade, taste free and soft, standing up to years of use. Platypus HyFLO Bite Valve Features Faster flow than previous bite valves Self sealing design Works with all Platypus shutoff