100% 18.5 Micron Merino Wool 400 g/m2 Interlock knit construction Brushed interior * Wool fleeced interior for extra warmth and rib knit cuffs with thumb holes in sleeves * Machine washable and machine dryable and Flat lock seams to prevent chafing * Weight of Garment Size Large = 1 lb. 12 oz. (793 grams) * Available in Men"s Sizes: S to XXL