Ultra Soft & Breathable: The compression socks is made of MERINO WOOL & VISCOSE from BAMBOO, which is anti-odor, moisture-wicking, thermoregulating, breathable, ultra-soft, lightweight, perfect for all-season comfort. Arch Support assists in optimizing foot force, Seamless Toe Closure protect your toes Sorbtek Repreve Polyester：Sorbtek fabric is a high-performance functional fabric developed by an American company. It forms a siphon effect through the grooves on the fiber surface, greatly enhancing the moisture absorption and perspiration management ability of the fabric. TRUE 4 ZONES GRADUATED COMPRESSION: 15-20 mmHg of Graduated Compression offer targeted Arch-to-Knee support that is strongest at the ankle and gradually decreases up the leg, boosting circulation and reducing swelling UNISEX in Multiple Occasions: Our compression socks are designed both for women and men. Perfect for all day wear, pregnant, flight, travel, exercise, and prolonged sitting or standing. Ideal for comfort during pregnancy, nurse, and athletes DURABLE & EASY CARE: Reinforced footpads can absorb shock, protect wear-prone parts. LYCRA enhance durability and comfort. Pre-shrunk compression stockings resist shrinking and maintain shape through washes; machine washable for convenience MAIN MATERIAL: 30% Merino Wool, 50% Viscose from Bamboo, 15% Repreve Sorbtek, 5% LycraWASHING INSTRUCTIONSWe suggest hand washing for optimal results; machine washing is alsoacceptable.Air drying is recommended for preserving the quality;low-heat tumble drying is also acceptable. Please use mild soap or detergent with warm water for washing. Avoid dry cleaning, bleaching,orironing  the socks.