WARMEST EVER HEATED SOCKS have been designed to keep your feet warm during the cold winter months. These heated socks have been tested to achieve a thermal tog rating of 2.13, and will keep your feet warmer to minus -25C or -13F ensuring your feet stay warmer for longer. a high tog rating provides extra insulation against low temperatures. Fits: Men's shoe size 6-13 Ladies shoe size 6-11 Colors will be shipped at random Material: High bulk acrylic yarn. Reinforced heel & toe for extra durability. New antibacterial treatment to keep your feet fresh & odor free. Comfort toe seam to reduce abrasion & improve comfort. BONUS: Moisture control to keep feet dry..