Here's what other sites are saying:
Perfect for cool-weather outdoor training as a base layer or on its own, the REI Powerflyte half-zip top features lightweight performace fleece, an active fit and 4-way stretch so it moves with you. Lightweight fleece features a moisture-wicking, quick-drying brushed inner face and a smooth outer face; fabric offers a UPF rating of 50+. Side panels of Polartec(R) Power Dry(R) fabric wick moisture, dry quickly and enhance comfort. The REI Powerflyte half-zip top features a zippered chest pocket with a headphone port. Deep front zipper; flatlock seams; reflective highlights. Overstock.
- REI refers to the men's version