A tailored, contoured fit with just the right amount of gradient pressure. Pressure greatest at the ankle and gradually reduces throughout length of the leg (15-18mmHg). Made of 80% nylon and 20% spandex. Measuring tapes included in each bag as well as loose in each box. Color-coded toe and top band to denote size and length. Sizes Small - XXX-Large; short, regular and long. X-Large Regular and Long fit calf circum 17"-19" (43-48 cm).