Comfortable nylon material. Bold color options. Improves blood flow and circulation. Fits over calf, just below knee. For exercise or travel use. Machine wash and dry. Dimensions: 11L x 4W x 1H in.. Ideal for athletes, travelers, and those with medical needs, the Evertone Calf Compression helps prevent deep vein thrombosis during long periods of inactivity. These socks fit over the calf muscles and offer gentle compression that also aids in post-workout recovery. They're made of stretchy nylon and come in a wide range of color options. Color: Red.