Our Waffle Knit Thermal Crewneck is knitted with thick Peruvian cotton blended with a bit of polyester. Soft and comfortable against the skin, the waffle-knit construction traps a layer of warm air for exceptional thermal retention. Worn solo or under a jacket, this dependable classic style provides versatile comfort in a wide range of temperatures. Rib-knit cuffs stay in place for easy layering. The long-staple Peruvian cotton is soft and sturdy.