Keep feet warm on the coldest of days and pull on a pair of Petunia striped, slipper style, crew length Heat Holders(R) for women, 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 Advanced thermal yarn More than 7X warmer than a basic cotton sock! Sensationally soft non-binding, and diabetic friendly Non-slip grippers on the sole Single pair pack