18% polyesterFOR CAT LOVERS: Lovely Cat design, Smiling, Dreaming, Sunning, Wondering, Playing. A great gift for cat lovers.USAGE SCENARIO:  Spring, Autumn, Home, Office, Every Day Use. Not Suitable for Winter and Summer outdoor activities.  Five vivid bright colors together with five cat posture design can easily match your style and mood.COMFORTABLE,DURABLE AND NO SLIDING:  Not too thick or too thin.  Ideal cotton content percentage to provide both comfort and durability.  Stay in place, no sliding down and scrunch into your shoe, contribute to the reasonable elastic welt design.PHYSICAL PARAMETERS:  Material: 80% Cotton | 18% Polyester | 1% Spandex | 1% Other Fiber  Size 9-10 fits Women’s shoe size:US 5-8.5| UK 2.5-6 | EUR 35-39  Colors: Yellow | Dark Green | Gray | Blue | Navy blue  Wash Notice: Machine washable. No shrinkable. Fastness, but wash the socks with other white color textile is not recommended.NOTICES FOR SPORTS ENTHUSIAST: These Crews are not designed for Sports Activity. You can look for our professional collections in our brand storefront with key words CoolMax, Shock Absorption, or Thermolite etc.