JOBST Sport Socks get the gold medal for performance. These long-wearing socks are designed for both men and women who need a sock that is breathable, lightweight and soft. Stay active and comfortable with these high-performing sport socks! Made in USA from 60% nylon, 10% spandex, 30% polyester.Features include:Dependable JOBST Compression: Graduated compression to help improve blood flow and reduce swelling.Moisture Control: Microfiber technology helps wick away moisture.Odor Control: Carbon fibers offer a unique odor control system to keep your feet and legs fresh and cool.Padded Foot: Extra padding absorbs impact for improved comfort.Extra Flat Toe Seam: Low profile seam ensures long-wearing comfort in your favorite sneakers or shoes.Cushioned Achilles: Cushioned padding protects tendons during physical activity.Comfortable Band: Wide band below the knee keeps socks in place even during your most active sport activities. Ankle Calf Size Small 7-8 1/4 inches 11-15 inches Medium 8 3/8-9 7/8 inches 11 7/8-16 1/2 inches Large 10-11 3/8 inches 12 1/2-18 1/2 inches XL 11 1/2-13 inches 13 3/8-19 5/8 inches