It is an old model or a product that we can no longer order at the manufacturer.
This is the game changer for your race! The Nathan 1.6 Liter Insulated Hydration Bladder is a low-profile hydration system designed to reduce slippage and keep your water colder for longer. No matter how hot the day gets, you can stay cool with this BPA-free bladder, featuring a high-flow bite valve and a large, easy-to-fill opening.