WARMTH. The yarns used have excellent thermal properties and when combines with the specialized manufacturing techniques we employ the result is the warmest thermal sock imaginable. COMFORT. You deserve comfortable socks and these are them! Just feel the inside of these heavily brushed lined socks and you can imagine how comfortable they will be on your feet. PERFORMANCE. With the inherent moisture management of these socks combined with the thermal properties the result is a fantastic performing sock: the warmest thermal sock imaginable.