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30% off during the OR Summit Sale. Prices as Marked. >>Shop Now
Snow Outerwear Is Officially on Sale! >>Save Now
Introducing the Next-Gen Helium UL Jacket. New Fabrics. Lighter. More Packable. >>Shop Now
Built for Cold. Ready for Anything. >> Shop Down & Insulated
Free shipping on US orders $125+
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The ActiveIce™ Spectrum Sun T-Shirt delivers cooling, quick-drying performance with thermoregulating ActiveIce™ technology, UPF 50+ protection, and bluesign® approved recycled materials for high-output days on sunny trails and mountain terrain.
Outdoor Research® gear is guaranteed to perform throughout the lifetime of the product.
Enjoy free ground economy shipping on orders $125+ USD / $175+ CAD. Please note: Final sale items cannot be returned or exchanged.
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The ActiveIce™ Spectrum Sun T-Shirt keeps you cool and protected through high-output days under the sun. Built for hiking, running, and active pursuits in warm conditions, it balances comfort and performance when the temperature climbs.
Powered by thermoregulating ActiveIce™ technology, it cools as your body heats up, maintaining a steady core temp through long efforts. The lightweight, breathable fabric wicks moisture, dries fast, and delivers UPF 50+ protection. Side slits free up movement, while chafe-free seams and dynamic reach patterning keep every stride and stretch smooth. Made with a recycled polyester blend and bluesign® approved materials for sustainable performance you can feel good about.
*All sizing is based on your body measurement.We adjust the garment for intended fit and intended use.
Classic fit for comfort and ease of movement.