\'The Ultimate Thermal Sock\'. The Heat Holders Men\'s Original Thermal Sock boasts a 2.34 Tog rating to keep your feet warm and comfortable on the coldest days.Highly insulating thermal socksExceptionally warm - heavy bulk yarn with massive tog rating of 2.34.Cushioned - comfortable long pile cushioning.Super soft inner - intensively brushed.Fabric composition: 91% acrylic, 5% nylon, 3% polyester & 1% elastaneRecommended activity - walking / casual / everyday wear