The QSHOP Mens Thermal Sock Feet need to be warm on the coldest of days, so pull on a pair of Heat Holders for men, the ultimate thermal sock. Product Details - Massive 1.10 tog rating - 0.85 warmer than a basic cotton sock - Advanced insulating yarn - Extra long looped pile 18IN - U.S. shoe size 8-12.5. - Choose from the large range of colors and designs available. - 60% Polyester /20% Cotton /20% Wool