Therafirm® Core-Spun Thigh High 30-40 mmHgThe Core Spun 30 40 mmHg Thigh High Compression Socks are made with ultra stretchy core spun yarns that make them easier to don and more comfortable to wear. FEATURES 30 40 mmHg (the mean compression for an average ankle size) Ultra stretchy yarns make the sock easier to put on Moisture wicking fibers Comfort designed top is non restrictive while staying in place all day Reinforced, comfortable heel and toe LATEX FREE fibers for soft, cool comfort