ASICS Microfiber Low Ankle Tab Quarter Running Sock (3-Pack) 76% Microfiber Acrylic 22% Nylon 2% Lycra Spandex Microfiber high tech acrylic offers superior moisture management, is naturally soft to the touch, helps prevent blisters, and resists shrinkage and mildew. Cushioned terry sole provides essential padding in strike areas Machine wash warm, Tumble dry low, Do not bleach Made in the USA