4-ounce 100% polyester - Timberland PRO Original Fit - WickWork technology forces the transfer of moisture away from the skin to the outside of the fabric where it can evaporate - Quick-drying lightweight/breathable polyester jersey with REPREVE recycled yard - Pick and pill resistant - Odor resistant - UPF 50 - Flat-lock stitching for no chafe - Tagless inside back neck label - Heat transfer logo on shoulder