4.7-ounce 100% polyester textured double knit - 3.8-ounce 100% polyester birds eye mesh panels - 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 - Breathable quick-drying fabric with odor resistance - Built-in 50+ UPF protection - Mesh side panels for breathability - Tagless neck label - Inside elastic back neck tape - Pick and pill resistant - Heat transfer sleeve logo