Content: 72% polyester 18% cotton 7% olefin 1% rubber 2% other fiber Care instructions: Machine wash warm with like colors, Tumble dry low temperature, Only non-chlorine bleach when needed, These comfortable thermal crew socks make getting ready for cold weather easy. These socks eliminate odors and wick away moisture as they help to improve the appearance of your feet. Great looking with smooth toe seam, This sock delivers comfort and warmth all winter long.