75% Silver Drystat, 15% Lycra, 10% Nylon Imported Machine Wash SILVER DRYSTAT is infused with Silver – using a base material of Polypropylene which is also naturally bacteria resistant. 100% recyclable. Odor happens bacteria comes in contact with sweat. These socks stop bacteria from growing and wick away moisture. 4-WAY STRETCH For consistent compression throughout the entire sock. Each pair is hand tested in our factory for performance and they are WASHED in chemical free fabric softener – making our socks Ready-to-Wear right out of the box. SIZE CHART: Small (Women 5-8, Men 4-7), Medium (Women 8-10, Men 7-9), Large (Women 10-12, Men 9-11), X-Large (Men 11-14). Due to the stretch of the sock choose one size down for more arch and plantar ligament support. Vitalsox factories are FDA Registered ARCH, PLANTAR, HEEL CUP SUPPORT ZONES. Extra support bands for your plantar ligaments and arch with a deep heel cup and flat toe seam. Every part of your foot is supported without pinching or cutting off your circulation to help prevent injuries. 100% MADE IN ITALY SINCE 1998. Made from start to finish in our own factory – never outsourced to the lowest bidder or built using machines designed for other products with inferior materials. GUARANTEED quality that stands out in your sock drawer.