Material: 80%acrylic, 18%polyester, 2%elastan 1. Brushed inside: comfort toe seam to reduce abrasion & improve comfort heated sox, moisture control to keep feet dry. Our specially developed advanced fibers provide high performance and superior moisture wicking abilities. 2. Insulated: Because work never stops when the temp drops, these heated insulated socks are built to provide maximum thermal regulation to keep your feet warm and comfortable in extreme cold conditions. 3. Ultimate Comfort: Full cushioned styles provides maximum padded protection for all-day comfort. NOTE: Machine wash cold and tumble dry low. DO NOT dry clean, iron, or bleach.