The Platypus Insulator protects your water from freezing or overheating. Insulating Cordura nylon surrounds the BPA-free Big Zip SL reservoir (included) and a sleeved drinking tube and bite valve cover further ensure all-season protection.
The durable Platypus Big Zip SL hydration system includes a reservoir, drinking tube, HyperFlow bite valve and a quick-connect fitting. This full-featured system converts any backpack into a hands-free hydration pack.
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