-Acrylic, Polyester, Spandex, Fleece -Machine Wash -Warm Socks for Women: Our thermal socks are made of 93% acrylic, 6% polyester, and 1% spandex, ultra-warm and soft. -Thermal Socks for Women: Our winter socks for women come in standard socks size fits women/girls' shoe 5-11, fits men/boys' shoe size 4-10. -Cold Weather Socks: The thermal socks are 7X warm than regular socks. The warm socks for women have been specially designed with long fleece inside, to keep your feet warm even when the temperature outside is too low. Our thermal socks for women are ideal for you if you work outdoors, go skiing, hiking, and camping in the mountains during the winter. -Winter Warm Socks: You may often need to go out in the cold winter, and you can enjoy the warmth of comfort by wearing our freezer socks for women. Especially suitable for the cold months, our winter socks for women can help you withstand the cold and humidity of winter. -Occasions: Our winter insulated socks for women are really convenient and suitable for hiking, running, walking, cycling, golfing, tennis, basketball, training, fitness, or just at home during the cold season. Also is the best gift for your friends or family members.