The Orion zip t-neck is a bold first layer of defense against the elements. 360 stretch polyester and Avra(TM) yarn offers unparalleled warmth, breathability and wicking. Wear it as a mid layer to significantly increase the warmth and functionality of any kit. 360Adeg STRETCH POLYESTER BRUSHED BACK JERSEY WITH AVRAA YARN CUSTOM SPYDER SEASONAL GRAPHICS REVERSE COIL CENTER FRONT ZIPPER CUSTOM INTERIOR LOCKER LOOP CUSTOM SPYDER ELASTIC