DermaSAVER Leg Tube. The two layers of soft, lightweight MicroSpring Textile™ form a loose-fitting tube that stay in place to protect fragile skin from pressure, friction and minor traumas. Breathable and self-supporting. Designed to fit loosely so as not to constrict circulation. Size: X-Small, 7" - 9" For sizing: Measure the circumference around the widest part of the calf. Choose the smaller size if measurement is between sizes.