What Our Gearhead(R) Experts Are Saying:"This is my go-to long sleeve for high-exertion activities under the sun. The ActiveIce technology actually cools me down as I sweat, and the UPF 50+ rating keeps my skin protected from harsh UV rays. I love the stretch fabric for unrestricted movement, and the thumbholes keep the sleeves in place when layering. Whether I'm hiking, fishing, or paddling, this shirt keeps me comfortable all day long."When the sun is blazing and we need reliable protection without overheating, we reach for the ActiveIce Spectrum Sun Long-Sleeve T-Shirt. Engineered with UPF 50+ sun protection and ActiveIce(TM) cooling technology, this performance tee actively lowers skin temperature as we sweat, keeping us cool and dry on even the hottest days. Designed for movement, the lightweight stretch fabric, chafe-free construction, and side-slit hem allow unrestricted mobility whether we're hiking rugged trails, paddling across open water, or climbing sun-drenched crags. Thumbholes provide extra coverage for long days outside, while the moisture-wicking fabric ensures we stay fresh and dry no matter how intense the adventure gets.