What if every day started with comfortable, practical, high-quality socks? At Heat Holders, we created thermal socks that keep feet warm without a sweaty mess and provide a healthy boost of circulation for all-day wear. Welcome to the proven Warmest Thermal Sock ever made. Our socks are ideal for anything from lounging around at home to wearing underneath winter boots and fit men's US shoe sizes 7 through 12. From hanging out to hiking a mountain, make life a little warmer and put your best-dressed foot forward with Heat Holders. Ever wish you could step in to your comfort zone? Heat Holders: Superior warmth and comfort from every pair, every wear. Heat Holders Technology So, how does Heat Holders do it? We start with a patented process of innovative, Japanese-inspired knitting using thermal acrylic wool. The ultra insulating material is woven in an extra-long loop pile that traps heat inside the sock and keeps you warm all day. The final step is an advanced brushing process of each sock's interior, for soft, fluffy socks and maximum comfort. A Shade for Any Kind of Day Heat Holders brings a whole new meaning to comfort colors. You can't go wrong with our classic selection of shades, made to match whatever type of day you have on tap. Select your favorite color, or triple the pleasure and try all three. Black Charcoal Denim Find the Perfect Fit At Heat Holders, we're so committed to your personal comfort that we've created three versions of our thermal socks, each with a different thermal grade and thickness. Select your temperature with: Original – 7x Warmer Than Traditional Cotton Socks. Thick-knit Original socks are a great choice to wear under boots. Lite – 4x Warmer Than Traditional Cotton Socks. Medium thickness makes Lite socks suitable for tennis shoes or moccasins. Ultra Lite – 3x Warmer Than Traditional Cotton Socks. The lightweight profile of Ultra Lite socks is ideal for tight-fitting shoes.