éIntroducing Xpandasox: a patent pending innovative new sock concept. Inspired by the red ridge that too tight socks leave on your leg, Xpandasox stretches to accommodate legs of all shapes, while adding gradient compression depending on your calf circumference. If you start your day and your calf is 15-18 inches the Xpandasox are 8-15 mmHg gradient compression as the day goes by if your leg swells to 18-21 inches the compression increases to 15-20 mmHg mild gradient compression, if your leg circumference increases to 21-24 inches the compression increases to 20-30 mmHg moderate gradient compression. 16 inches long from heel to top band. Machine wash warm. Non-chlorine bleach when needed. Tumble dry low. Body: 61% cotton, 37% polyester, 2% spandex. Panel: 84% nylon, 16% spandex.é