Say goodbye to cold feet! These specially-designed, ultra-thick socks use aerospace fabric technology to keep your feet warm, even in the coldest weather. Made of aluminized threads woven into a soft knit fabric, they reflect your own body heat to keep you warm and comfortable. Great for men or women, they're perfect to wear indoors or outside. Machine wash and dry. Choose: Women Size 5-7 or Mens 6-8.