Medi has created a luxuriously soft and comfortable open toe stocking using the latest 3-D knitting technology and microfiber yarns. Their patented Climafresh system adds an anti-microbial feature to prevent the formation of odors. Clima-Comfort technology allows for high fabric breathability, which means you stay cool. To top it all off all Comfort support hosiery can be machine washed and dried. Made in the USA from 63% polyamide and 37% elasthane.