WSI Arctic Microtech Long - sleeve Shirt, the best in cold - weather performance wear! High-performance athletic apparel, made from special 100% polyester Microtech fabric that traps heat, blocks wind and wicks away sweat! The fabric is body-mapped, thinner under the arms for ventilation and freedom of motion, thicker in the body and arms to block wind. Athletes swear by it, and for good reason... it fits great and provides critical warmth! Stretch-fit. Made in the USA. Machine wash / dry. Imported. State Color and Size. Order yours today! Men"s WSI Arctic Microtech Long-sleeve Cold Weather Performance Shirt