Keep them warmer with Heat Bods Thermal Socks. Give your kids the warmest socks for winter to keep their feet comfy and toasty in chilly weather. Underworks Heat Bods™ Thermal Brushed Crew Socks are made of extra thick yarns that trap heat near the skin for ultimate warmth and comfort. TOG is a unit of measurement used to calculate warmth. The rating of these Heat Bods™ socks is 2.3 TOG. When compared to cotton socks that rate about 0.5 TOG, these Brushed Crew Heat Bods™ socks are five times warmer, and super brushed for extra softness & comfort!! Your kids are going to love you for loving their feet...