Uniqlo Heattech Socks - Set of 3 My child doesn't want to wear these, saying they're too warm, so they've only been worn a few times. However, possibly due to the material, there is some pilling. This is especially noticeable on the navy blue pair. Please understand that these are used items from a child before purchasing. I am also selling: Uniqlo Heattech Extra Warm Leggings Uniqlo Heattech Shirts Please take a look at those as well. Sizes: 16 cm 17 cm 18 cm 19 cm 20 cm