UPF 50 | Quick-dry, breathable material keeps baby cool & comfortable | Water-friendly foam brim stays out of baby's eye when wet | Elasticized back adjusts for custom fit & grows with baby | Stay-put tie strap | Lightweight and packable for easy on the go | Materials: Wicking polyester shell; Wicking polyester lining; EVA foam | Made without Azo Dyes or Formaldehyde | Care: Machine Washable