Thick and warm, giving you the most protection against the cold and also providing a comfortable fit. Material Composistion; 91% Polyester, 9% Elastane. Machine WashableThey have a massive Tog rating of 0.52! Which means they're extra warm for the coldest of days.Expertly brushed inner giving them the ultimate soft and loveliest of feelings when worn. It also gives you the most comfortable of fits, combined with their new and improved better fit.