Zip up to stretchy, moisture-wicking comfort. As you hike, run, or move in any way on a cool day, perspiration can always bog you down. So, rather than dealing with sweat buildup and the chill and discomfort that follow, Techwick(R) material moves moisture away from the skin. Feeling dry, then, helps you stay focused on your end goal.. . Fabric Body: 100% polyester knit jersey Techwick