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TechNiche Coolpax Phase Change Hydration Cooling Vests has a built-in hydration reservoir with a drink tube and bite valve. Coolpax Cooling Vests with Hydration System have V-neck design with zipper closure, hook and loop girth and shoulder adjustments. Vests are 100% cotton vest, with the thermal liner. They Include integrated 70 oz/2 L personal hydration system.
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CoolPax is made of Phase Change Material (PCM) cooling technology. It uses a non-toxic carbon-based liquid that freezes at 58F/14°C and remains at that temperature for 2-3 hours. Simply place CoolPax inserts in freezer or ice water for 35/40 minutes and insert into garment pockets. Science Behind CoolPax- A Phase Change Material (PCM) is a substance with a high heat of fusion which, melts and solidifies at a certain temperature, and is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes from solid to liquid and vice versa; thus, PCMs are classified as Latent Heat Storage (LHS) units.
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