If someone came across a black cat when they opened an umbrella indoors on Friday the 13th while wearing this pair of socks, how many years of bad luck do you think they’d get? Let us know if you find out. FIBER CONTENT 66% Cotton, 33% Nylon, 1% Spandex SIZE DETAILS Fits Men's Shoe Size 9-13 CARE INSTRUCTIONS Machine wash cold, tumble dry medium heat. Do not bleach.