80% Nylon, 20% Spandex Made in the USA Trufrom 0865; Medical support hose; Unisex style durable knit; 20-30 strength graduated compression Soft top will not constrict leg; Defined heel enhances fit; Easy inspection sandal wear toeless foot Use for extensive sitting or standing, travel, pregnancy, post surgery recovery, improved circulation Helps relieve swelling, varicose veins, spider veins, sore aching muscles, edema, DVT blood clots Made in the USA; Measure according to size chart; Latex-Free; Nylon and Spandex construction