TOP QUALITY: The fibers in Essential Cotton are innovative in the sense that they enhance performance and durability. We use high-filament synthetics and channeled polyesters blended with cotton which wick away moisture. HIGH STANDARDS: All Sigvaris products are listed as Class 1(general edema) and Class 2(blood flow). Along with being ISO(International Organization for Standardization) this proves that our products truly benefit customers. ORIGIN: Born in Switzerland. Made in the USA. People buy and wear compression garments for the management of certain issues, such as leg comfort during long-distance travel and the management of leg swelling and vein issues. SIZING: Our knitting machines regulate stitch length and yarn tension while shaping the fabric to a leg model for the best fit. The compression level of these socks is 20-30mmHg, which was crafted with the most precise sizing chart in the industry. MATERIALS MATTER: Every single one of our products is made of natural and synthetic fibers and contains no animal products. Made of 50% Nylon, 25% Spandex, 25% Supima Cotton; Latex-Free, Sigvaris makes products that are effective, durable, and of the highest quality. Sigvaris Essential solutions always meet your customers needs. These straightforward products are an everyday go-to for people who seek the comfort, support and reliability of traditional therapeutic socks and stockings.