LIGHTWEIGHT YARN SOCK: Heat Holders socks are designed to provide thermal protection in a slim lightweight profile and are 3X 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 crew thermal socks are made of 89% acrylic, 10% nylon, 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 Keep feet warm on the coldest of days and pull on this pair of fashionable multi-stripe, lightweight, crew length Heat Holders ULTRA LITE for men, the warmest thermal sock.