What Our Gearhead(R) Experts Are Saying:"This is my go-to layer for sunny hikes and high-output activities. The UPF 50 fabric keeps my skin protected from harsh rays, and the moisture-wicking material keeps me dry even when I'm working hard. The half-zip lets me dump heat quickly, and the low-profile thumb loops make layering a breeze. Whether I'm on the trail or just out for a morning run, this piece is a must-have."From sunrise trail runs to summit lunches, the Crater Lake Half-Zip Top keeps us protected and comfortable in any adventure. The ultra-soft, jersey-knit fabric wicks away sweat while delivering UPF 50 sun protection, so we can focus on the journey without worrying about UV exposure. A well-placed half-zip lets us control our airflow, whether we need extra ventilation during a climb or a little extra coverage when the wind picks up. Low-profile thumb loops keep our sleeves in place when layering, making this an ideal piece for year-round performance.