Sockwell Damask compression sock is crafted in the USA of fine merino wool and rayon from bamboo with spandex throughout the sock for superior fit and comfort. 15-20mmHG compression promotes circulation, minimizes swelling and reduces fatigue. Great for prolonged sitting or standing, flying, travel and exercise. Features moderate compression, extended arch support and an ergonomic fit heel.Graduated compression leg; 15-20mmHGUltra Light Cushion SoleSku: SW16W-340