Stay warm during the coldest months with these thickened, fleece-lined thermal socks. Designed for both comfort and insulation, they feature a soft velvet-like inner lining that provides a self-heating effect to keep feet cozy in temperatures down to -10°C. These versatile crew-length socks are crafted from a durable blend of polyester and elastane, making them ideal for everyday wear with boots or sneakers, as well as for use as indoor floor socks.