Saucony Women's Ultra Cushioned No Show Heel Tab Socks 77% Rundry Ultra/21% Nylon/2% Spandex Machine Wash 77 percent rundry ultra, 21 percent nylon, 2 percent spandex. Rundry ultra has superior moisture transport. Maximum breathability Engineered arch stability makes secure and stable fit. Airmesh venting is breathable mesh panels. Enhanced airflow Seamless toe prevents irritation Cushioned sole with high density cushion provides superior comfort and added durability