They are labeled UPF 50+ in multiple entries. Some descriptions also state they block up to “99+% of harmful UV rays.”
Common features are chin straps or tie closures, adjustable toggles to accommodate growth, easy-close or breakaway clasps, and adjustable chin straps designed for a secure, safe fit.
Care instructions generally recommend machine washing and either line drying or laying flat to dry. Many listings also call the hats machine-washable and quick-drying.
Comfort features include lightweight fabrics, mesh or wicking liners, and quick-dry materials designed to help keep babies cool and comfortable.
Reported brim lengths range roughly from 1.9 to 2.75 inches, while crown heights are about 2.75 to 5.62 inches across the listed options.