The Carhartt Teller Hat is a warm winter hat made from 100% comfortable acrylic. Inside the material is an insulating layer of 3M Thinsulate Stretch 40g that is lightweight, warm and flexible while providing excellent heat retention and moisture wicking. Main cap features and components: Material: 100% acrylic, 40g, 3M Thinsulate Stretch insulating layer, embroidered Carhartt logo on the front, small Carhartt logo on the back. Cover made in Canada. 3M Thinsulate Stretch, an insulating layer that moves, moves with you. The flexible insulating layer gives outerwear, sportswear, gloves and accessories the freedom to expand and contract with the material. The 3M Thinsulate insulation provides excellent heat retention while wicking excess moisture away from the fabric for all-day comfort.