Still waters run deep! This sneaky shark hat is lightweight,packable, and made for the fans of our ocean friends. Size: Kids ages 3-6, One Size fits most. Designed for a regular fit; Not too loose and not too tight. Machine knit acrylic winter hat - 100% acrylic Fully-lined with recycled micro fleece made from 100% Recycled Polyester Less itch feel with recycled micro fleece lining.