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The ActiveIce Spectrum Sun Long Sleeve Tee is built with thermoregulating ActiveIce technology and bluesign approved materials, perfect for keeping body temperature in check while hiking, backpacking, climbing, or setting up camp.

This tee is built with an ultra-comfortable, breathable, and quick-drying polyester blend treated with our proprietary ActiveIce technology. ActiveIce reacts to your body's rising temperature by cooling down your core, keeping you in the sweet spot longer while pushing the tempo or working hard. The chafe-free design, built-in stretch, and UPF 50 are welcome essentials for long days spent under the sun, delivering comfort and maximum range of motion on reachy boulder problems or tight slot canyon squeezes.

Purpose-built for staying cool while spending long days in the mountains under the sun, the ActiveIce Spectrum Sun T-Shirt is a warm-weather staple for every outdoor enthusiast.

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