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Wearable drinking systems were a giant leap for athletes. But hydration backpacks aren’t without shortcomings—like straps that can tangle with chairlifts and tree limbs, and drinking tubes that are prone to freezing. Designed for winter athletes, the new CamelBak ShredPak ($200) integrates a removable 72-ounce reservoir with a softshell vest, which prevents water from freezing and gives the system a low-bulk, strap-free fit. http://www.camelbak.com