The Sockwell Chevron Women's Black 15-20mmHG sock features an ultra-light cushion sole, arch support, and seamless toe closure. The classic knit pattern of Chevron is made on the signature fine merino wool/rayon from bamboo yarn blend. It is recommended for prolonged sitting and standing, exercise and recovery, minor to moderate varicose veins and relief from plantar fasciitis. The Graduated compression helps to minimize swelling and reduce fatigue. It includes 32% merino wool, 31% bamboo rayon, 32% stretch nylon and 5% spandex.