56% Nylon/41% Hydrotec Polyester/3% Lycra Spandex. Made in US. NB DRY moisture management technology quickly moves sweat to keep feet cool and dry. Seamless toe. Stability Fit arch support for a snug fit. Anatomical left/right foot design for the ultimate fit. Minimal cushioning for a second skin feel. Breathable mesh panels promote airflow to keep feet feeling dry and cool.
Medium Size: 7.5 - 9 Men's / 6 - 10 Women's
Large Size: 9 - 12.5 Men's / 10 - 12 Women's