65% Cotton, 35% Polyester Imported elastic closure Machine Wash Reliable Heat Retention: Made of cozy waffle-knit fabric, our thermal shirts for women trap and retain body heat within the waffle pockets; A ribbed collar and cuffs help keep the cold out Soft Cotton-Poly Construction: Our thermal underwear for women is constructed of a comfortable cotton blend enhanced with polyester for added durability Comfort-Driven Design: Our long underwear top features a tagless label; Our machine-washable long-sleeve undershirt for women won't shrink excessively after washing