Mens Womens New Compression Socks Cotton Fit Knee High 20-30mmHg Support. - | | Color: Black * Material: Cotton, Microfiber, Spandex * Size: * XXL Women's Shoe Size 13+, Men's Shoe Size 12+ * Features: * 1.Non-binding, breathable, comfortable, soothe tired, achy legs and feet! * 2.Optimal compression increases blood flow during a long flight and prevents swelling. * 3. The heel zone is strengthened additionally that extends the service life of the products. * 4. Helps to reduce swelling