Comfort are the most comfortable semi-sheer support stockings available. Using the latest 3-D knitting technology and microfiber yarns, Medi has created a luxuriously soft and comfortable stocking. 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. All Comfort support hosiery can be machine washed and dried. Made in the USA.