100% polyester mini-grid fabric feels great, and it retains ample amounts of body warmth. This midweight Force base layer FastDry ® technology for moisture-wicking, quick-evaporating performance to keep you dry and comfortable while you work. Plus, Rugged Flex ® stretch technology delivers a give to the fabric for an unrestricted range of motion. An odor-fighting treatment keeps you fresh and free of unwanted odors. Carhartt Force men’s crew a zip pocket at the chest for small essentials. Other include smooth flatlock seams, tagless label, and a concealed thumb loop. Machine washable.Men’s Crew Force Ext. Thermal Top,100% Polyester Low Mini-grid Fabric,Retains Ample Amounts of Body Warmth FastDry for Moisture-Wicking Performance Rugged Flex Fabric adds ease of movement Odor-fighting treatment Zip pocket at chest Smooth flatlock seams,Concealed Thumb Loop Tagless Label.