REI Airflyte Mock Top
Here's what other sites are saying:
The REI Airflyte Mock top takes the chill out of cool-weather workouts. Quick-drying, sleek and functional fabric wicks moisture while you exercise to keep you dry and comfortable. Soft and cozy neck enhances comfort and doesn't chafe. Thumb holes keep sleeves in place while your arms are in motion. Fabric provides UPF 50+ sun protection, shielding skin from harmful ultraviolet rays. The slim, performance fit of the REI Airflyte Mock top enhances workouts with 4-way stretch.