Size Medium - Fits Shoe Size 8-10 1/2; worn once and washed. Everyday Compression Socks (15-20mmHg) Made with a medium level of compression, these Compression Socks aren’t too tight—they’re just snug enough to feel supportive. Great for those who like traveling, running or if you have a job where you’re standing on your feet all day, like nursing. Or maybe you just want to enjoy the extra support of a tighter-fitting sock. They’re good at that, too. Features Seamless Toe Strategic Zone Cushioning Honeycomb Arch Support 15-20 Mmhg Compression Level Stay-Up Technology Extra-Long Staple Cotton Full Fabric Content (15-20mmhg) : 69% cotton (supima®) 16% polyester 9% elastane 6% nylon