Bleu Foret combines the finest in French tradition and innovation to provide an optimal comfort and unique pleasure. These Bleu Foret invisible ballerina socks feature quality of natural fibers, perfect fit and comfort. All Bleu foret have reinforced toes and hells. These invisible ballerina socks are great sockets that can be worn without being seen or leaving any lines! 67% Mercerized Cotton, 29% Polyamide and 4% Spandex. Wash inside out and lie flat to dry.