fashion mens socks are made of 35% Wool, 24% Cotton, 36% Polyester, 5% Spandex. Size:Free size, is suitable for US mens shoe size 6 to 12, elastic and perfectly fit on your feet which is great to wear 5 PAIRS – 5 RANDOM COLOR : Each Package including 5 pairs of attractive colors crew socks.The unique style and colors of these socks can be matched with any clothes you choose to wear today! THICKNESS: They are thick but not overly so, and just the right thickness for comfort and warmth with boots, loafers or sneakers. Not terribly thick, but thick enough to keep your feet warm in winter. Totally Worry Free: Satisfaction or get your money back .