Falke is known for excellent fit and functional materials. The TK-X offers lots of characteristics that enhance wearing comfort and function, both when using them directly on your skin and when combined with thin liner socks. Thanks to the material blend, this model is a great choice for cool and cold conditions. For Falke fans: this product is practically the TK-4, but with a new name. - 34% acrylic, 29% polypropylene, 27% Merino wool, 9% polyamide, 1% elastane - Three layer structure reduces risk of chafing - Dedicated left and right side fit - Great thermal insulation - Shaft height works well even with higher boot shaft lengths