Made from Brio-tek 200, this shirt is the perfect base layer for winter riding.  Arista's Brio-tek shirts are an essential piece in every rider's closet. Moisture-wicking fall/winter Brio-tek 200 contains 21% spandex to ensure total freedom of movement while you ride, and the surface has been lightly brushed to feel luxuriously soft and eliminate chafing.  All Arista shirts are treated with an environmentally friendly finish to ensure they stay fresh, hygienic and odor resistant. No mesh under the arms.