Salvere Medical 15-20mmhg Compression Stockings Sheer Black Durable Size M Brand new, sealed No roll waistband Moisture wicking Lightweight Pressure is tightest at ankle Reduction of swelling Graduated pressure squeezes muscle and tissue around the vein wall to move blood towards heart Size M Measurements: Smallest Ankle Area 8 3/4 - 9 7/8” Largest Calf Area 11 7/8 - 16 1/2” Largest Thigh Area 18 1/8 - 27 1/2” Center of Hips 30 - 50” Average Shoe Size 7.5 - 10 65% Nylon 35% Lycra Spandex