GOOD MATERIAL: The baby sun hats are made of high quality and soft polyester, the inside of sun hat has a breathable mesh lining, super breathable, comfortable and cool.SUN PROTECTION: These children's sun hats are designed to protect your child against harmful UV rays while playing outdoors in the summer. The wide soft brim in the back of the hat for added protection on the neck and shoulder. There is also an adjustable tie under the chin to keep the hat firmly in place.LIGHTWEIGHT and BREATHABLE: These kid's sun hats are specially designed for maximum comfort and protection in the sun. It's lightweight and packable. The hats are breathable with air holes for added ventilation. The sun caps also have mesh in the back of the hat for added comfort and coolness.