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(R) . Techwick(R) material controls moisture, pulling perspiration away from your skin, so that you remain dry, and offers antimicrobial properties to block the growth of odor-causing bacteria. Techwick(R) Essence Series adds a Microban(R) antimicrobial finish for dependable moisture control and infuses the material with moisture-wicking, quick-drying properties that keep you comfortable, even during intense activities. Mechanical stretch provides freedom of movement. Semi-fitted style with mock neck. Quarter-zip front with draft flap lets you adjust ventilation. Reflective strip on back offers visibility in low-light conditions. Flatlock seams reduce irritation. Tagless neck with Techwick(R) heat transfer logo. Techwick(R) reflective logo near hem; EMS logo on left sleeve. 26" length. Machine washable. Imported.