Thank you for viewing! SMOOTHY Kids' Knit Cap 50% Cotton, 50% Acrylic Since it's not wool, it can be worn in the summer. I wore it often, so there may be some minor, inconspicuous pilling, but I don't see any stains. The fabric is quite sturdy. It has been hand-washed at home with a detergent for delicate clothing. Please see photos 5 and 6 for the size. I look forward to connecting with someone who understands that this is a used item.