American Trench The Supermerino Marled Merino Crew Socks 6-10 Women Brand: American Trench Size: 6-10 Women Color: Deep Teal 77% Merino Wool, 20% Nylon, 3% Spandex. Wash cold and gentle, lay flat to dry. Please be aware that these socks will pill and become threadbare if not washed with care. Though rough-washing them will not affect their overall performance as socks, we believe these are great enough for the utmost care. The Supermerino is an exceedingly luxurious merino wool crew sock. Woolen-spun yarn, instead of worsted-spun, creates plenty of room for air while retaining warmth. The yarn’s fluffiness envelops your foot with every step, still remaining breathable and padded.