The Ashaway ARV328 Tee is constructed from a NEW Ashaway TEC-DRY material. Which makes this shirts a lightweight and extremely comfortable shirt to wear. The shirt also has the unique ability to cut out over 85% of UV and Infra red radiation to keep you cool while you train for additional comfort. Lightweight Draws perspiration away from the body and allows it to evaporate quickly Cuts out over 85% of UV and Infra red radiation keeping you cooler Stretches and moves with your body