MEDIUM WEIGHT THERMAL YARN SOCK - Heat Holders socks are designed to provide thermal protection in a medium to thick profile and are 5X warmer than a basic cotton sock SUPER SOFT - Our fuzzy thermal socks keep you warm and comfortable DIABETIC FRIENDLY - Heat Holders are made with a patented loop technology that allows for enhanced warmth and are made with a non-binding top for a comfortable fit VERSATILE COLD GEAR - Our thermal socks are made of 93% acrylic, 6% polyester, and 1% elastane for the ultimate combination of warmth, softness, and comfort HEAT HOLDERS - We make socks in three different levels of warmth while providing thermal protection & comfort to fit whatever your day may bring