These knits hats for doll and friend are made with Caron Simply Soft acrylic yarn. If anyone has allergies I can make in 100% cotton. They are washable and dryable but would hand wash to preserve pom pom. Everything I make is in my smoke free home. There is one size fits all size and child size. But would order for child 4 and under for child size. Set includes doll hat, regular hat and doll shawl. New Disney movie Wish main character Asha doll will fit my doll hats.