Keep feet warm on the coldest of days and pull on this pair of Michael solid color, slipper style, crew length, extra large,Heat Holders(R) for men, the warmest thermal sock. Fit & Design: Thick, chunky and with a massive tog rating of 2.34 Heat Holders(R) are made from a specially developed heavy bulk yarn which has extreme thermal qualities Long-pile cushioning Extra-large size Advanced thermal yarn More than 7X warmer than a basic cotton sock! Sensationally soft Non-slip grippers on the sole Non-binding, and diabetic friendly Single pair pack