HIGH-GRADE MATERIAL: Top layer: 85% nylon 15% spandex; bottom: 90% cotton 10% nylon. Sweat absorbent fabric material is moisture control, soft, wearable and anti-bacterial. FREE SIZE: Invisible socks fit for women's shoe size from 2.5-6.5(UK); KINDLY REMIND: someone with wide soles and high insteps usually wear size 6.5 and it is recommended not to buy them because you will feel tight socks VERY BREATHABLE: Breathable, lightweight thin, moisture wicking, sweat absorbent material fights foot odor, which make your feet stay dry and fresh all day. Easy to wash-machine washable and hand wash. SUPER ELASTICITY: High elastic low cut socks suitable for different foot size, so you don't need to worry about the size. Allow your feet to breathe, stay comfortable and eliminate foot odor. SUPER VALUE QUANTITY: 6 pairs non-slip boat socks, suitable for many kinds of shoes; they are your wonderful gifts sent for your friends, relatives and other people. Multiple Occasions: Applicable to many occasions home or workplace, casual or formal Comfortable low cut socks for women and girls Breathable women no show socks for casual wear Flat non slip boat socks for boat shoes and sneaker Invisible women loafer socks for girls holiday gift Specification: Material: nylon, silicone Colors: black Quantity: 6 pairs Product Care: Both hand and machine washing