This heavy weight underwear is knitted from a blend of 80% wool, 20% nylon for easy care, absorbent comfort, warmth and long wear in a heavy rib knit. A combination of white and black yarn gives the underwear its distinctive gray appearance.The union suit has a button front with crew neck, ribbed cuffs and an easy-to-use one-button flap seat. Machine washable on gentle cycle. Made in Canada.