Revitalizing Benefits: Graduated Compression- Maximum compression at the ankle gradually decreases up the leg to boost circulation and reduce swelling and aches. Moisture-wicking fibers keep feet dry, healthy and comfortable! Massages As You Move- To soothe tired, achy legs and feet! Vein Therapy- Helps relieve symptoms of varicose veins. Perfect for being on your feet, sitting all day, or traveling! Size Chart for Compression Socks and Ankle Sleeves: Small/Medium- Women US sizes 6.5 - 8.5 and Men US sizes 5-8.5 Large/Extra Large- Women US sizes 9-11 and Men US sizes 9-10.5 XXL- Women US sizes 11.5-13 and Men US sizes 11-12.5