1% spandex TOP TECHNOLOGY: Running, Biking and Swimming require a versatile sock, and you’ll be prepared for any terrain with Wigwam’s Ironman Triathlete Pro Quarter. Ultimax Pro technology and X2O Acrylic team up to provide unstoppable moisture and odor control. KEEP IT FRESH: Designed to combat foot odors, everyone will benefit from you investing in Wigwam’s At Work Socks. They are specifically constructed to combat sweat and odor, keeping your feet dry and fresh even after working overtime. CARE INSTRUCTIONS: A little bit of care can keep your Wigwam socks performing well for years. For best results turn socks inside out before washing. Wash in warm water and tumble dry on low heat. Maximum water temp is 120 degrees F / 50 degrees C. Do not bleach. Use normal cycle setting, set dryer at low heat. THE WIGWAM STANDARD: Wigwam Mills, Inc. is proud to knit its socks in Sheboygan, Wisconsin, U.S.A., just for you because we care. We want you to feel good about buying the Wigwam brand because we’ve set a standard of integrity that we strive to live up to every day. PRODUCT SPECIFICATIONS: Wigwam Ironman Triathlete Pro Quarter Sock (Black, Large). 41% Stretch Nylon, 28% Olefin, 26% X2O Acrylic, 4% Stretch Polyester, 1% Spandex. Product Features: Ultralight Weight, Dry Feet, No Blisters, No Odor, and Seamless Toe. US Patent No: 5,095,548.