Thank you for viewing! (1 set also available. ¥420) (2 sets also available. ¥570) (3 sets also available. ¥770) (4 sets also available. ¥950) (Also available: a great value 6-set for ¥1,270) ☆ Self-Heating Socks [Magnetic Socks] ☆ Color: Black ☆ Size: Unisex, Free Size ☆ Material: Tourmaline, Polyester ☆ Please refrain from purchasing if you are sensitive to products made overseas. ★ Features & Effects ◎ High-quality polyester with soft and comfortable properties. ◎ Tourmaline socks relieve foot fatigue and pain, regulate the nervous system, self-heat, remove moisture, eliminate odor, reduce foot swelling, prevent skin peeling, provide static foot massage, and regulate blood flow. ◎ Ideal socks for feet with varicose veins. ◎ Stimulates acupressure points. ◎ Wear with the protruding side facing inward. (For the image, we will send them inside out) [For washing, hand wash in lukewarm water (or water). (If using detergent, use a neutral detergent)] Color: Black Pattern/Design: Solid