What Our Gearhead(R) Experts Are Saying:"This tee is perfect for long days in the sun. The ActiveIce(TM) fabric actually cools as I sweat, keeping me comfortable even in scorching heat. It's breathable, quick-drying, and offers UPF 50+ protection, making it my go-to for hiking, running, and climbing. Plus, the side slits add mobility, and the chafe-free design makes all-day wear a breeze."When the sun is beating down, we count on the ActiveIce Spectrum Sun T-Shirt to keep us cool and protected. Built with ActiveIce(TM) technology, this tee regulates temperature by cooling as we sweat, while UPF 50+ sun protection shields us from harmful rays. Whether we're hitting exposed trails, paddling under an open sky, or spending all day on the rock, this shirt helps us stay dry, comfortable, and protected. Designed for movement, the chafe-free construction and dynamic reach design let us move freely without restriction. Side slits at the hem add breathability and improve mobility, making this tee an essential layer for high-output adventures in sunbaked conditions.