Aetrex uses a non-binding yarn with Spandex that hugs the leg without restriction. A smooth toe seam provides extra protection and the Aetrex technologically advanced Moisture-GuardT wicking system helps control odor and rejuvenate the skin. Extra cushioning option for superior comfort & shock absorption makes this sock a true comfort to wear. Doctor recommended for diabetes. Fiber Content - Acrylic, Polyester, Cupron Polyester, Nylon, Spandex.