Sockwell’s Lotus Lift 20-30mmHg Firm Graduated Compression sock features spandex throughout the sock. The women’s sock includes ultra light cushion sole, graduated compression leg, turn welt top, arch support and seamless toe closure. It comprises of 32% Merino Wool, 31% Bamboo Rayon, 32% Stretch Nylon and 5% Spandex. It is machine washable with cold water and can be air dried.