32% Merino Wool / 31% Rayon from Bamboo / 32% Stretch Nylon / 5% Spandex HIGH PERFORMANCE YARNS: Provides natural moisture management, odor control and thermoregulation. RECOMMENDED FOR: All day/everyday wear, flying and travel, prolonged sitting of standing, exercise, recovery and pregnant women. Ideal for those who work in professions that demand prolonged standing, nursing, healthcare, retail or even construction. 4 ZONES OF MODERATE (15-20 mmHg)GRADUATED COMPRESSION: helps to minimize swelling and reduce fatique. Energizes legs and feet. Soothes and energizes tired feet and legs. Relieves minor to moderate varicose veins. COMFORT & PERFORMANCE FEATURES: Accu-fit Technology, Graduated Compression, Turn Welt Top, Arch Support, Seamless Toe Closure. Ultra Light Cushion Sole.