Wicking polyester next-to-skin Built-in 30+ UPF protection Side-seam construct...Wicking polyester next-to-skin Built-in 30+ UPF protection Side-seam construction Tag less neck label TIMBERLAND PRO: Timberland PRO work shirts, work pants, jackets, shirts & more are made with the quality you've come to expect from Timberland PRO.more