This invisible running sock has been cleverly designed by falke to sit neatly under trainers giving you all the comfort freshness and support of wearing a sock without the look with a left and right toe progression and anatomically knitted cushioning on the toe and sole this pair of trainer socks has a specific left and right sock for an incredibly sleek fit the anti slip system which comprises of a heel grip and support will help these socks stay in place during your run made rich in sof