Just like the beer koozie, Bladder Insulators will insulate your reservoir - water bladder. Insulate your water bladder reservoir before you put it in your pack or carrier. *****There are many sizes, shapes, and models. If your water bladder doesn't match or has different measurements than listed on the size chart, please Contact Us so we can get you the right Insulator. (Example: Camelbak has a SHORT and a LONG water bladder with same model name.) Please see all our listings or shoot us an email.
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