Ensure you stay warm and cosy at work with these durable thermal socks. The reinforced heel and toe means the socks are guaranteed to last. They are constructed from HEAT HOLDERS YARN™, which is a thermal yarn specially developed to provide wearers with high performance insulation against the cold, whilst maintaining enhanced breathability. The socks also comprise HEAT HOLDER LOOPS™, a knitting technology which produces a unique, extra long looped cushion pile to hold in more warm air, increasing the TOG rating. HEAT HOLDERS BRUSHING™ maximises the amount of warm air held inside each sock for total warmth and all-day comfort. The socks composition is 91% acrylic, 5% polyamide, 3% polyester and 1% elastane.