The Polarmax Men's Performance Cotton Thermal Crew is a mid-weight shirt made with technical cotton. Unlike traditional cotton base layers, Polarmax's TransDry Cotton features moisture management technology that reduces cotton's absorbent capacity and overall drying time by 50%. This material transfers moisture away from the body over a wider surface area of the fabric for quicker drying time while reducing cling to your skin. All while you enjoy the comfort of traditional cotton. Made in the USA.