Fit & Design: Flat lock seams for chafe-free comfort Raglan sleeves with thumbholes Tagless neck label Technology: WickWork(TM) technology moisture-wicking fabric draws perspiration away from the skin, helping to keep you comfortable while working Material used has been treated to provide an Ultraviolet Protection Factor (UPF) of 50, limiting the transmission of ultraviolet rays to help protect your skin from sun damage This fabric is designed to stop the growth of odor-causing bacteria, which helps your clothes to smell cleaner for longer