Timberland PRO Men's Wicking Good Long-Sleeve T-Shirt with Logo 100% Polyester Imported Machine Wash Main fabric: 4.5 - ounce 100 percent polyester textured knit panels: 3.4 - ounce 100 percent polyester mesh Innovative workday-strong fabric dries fast and is designed to keep odors out Built-in 50 plus UPF protection provides excellent sun blocking power Mesh side panels boost airflow and ensure maximum mobility Integrated thumb holes for ease of layering