1. Adjust appropriate size in accordance with baby's head
2. Use when baby wash hair--can prevent water and shampoo running into eyes and ears to cause discomfort or even sickness like green-eyed or ear infections, etc.
3. Use when go out in the sun--can effectively block the ultraviolet rays.
4. Use when baby has hair cut--can prevent the hair falling to baby's eyes, face and neck.
5. Hang it up to dry out after use.