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Outdoor Research says:
Best-selling ActiveIce™ technology is upgraded for Spring 2021 to work more efficiently and effectively than ever before. Now featuring the same thermo-regulating formula as our proprietary ActiveTemp™, this new version of ActiveIce™ dynamically adjusts to your body’s temperature to cool you faster when you need it most. Still wicking and complete with a UPF 50+ sun protection rating, ActiveIce™ is the perfect companion for anyone who spends serious time in hot, sweaty, sun-baked conditions. Our ever-popular Sun Sleeve design is an easy solution to pull-on sun protection, with a bicep grip to hold itself in place.
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