1 Piece Children's Cartoon Anti-Fall Cap Lining: Polyester Spandex Fabric: Polyester Plus Spandex Interlayer: EVA Material Shock Absorption And Anti-Collision 360-Degree Protection Of Toddler Safety Fifteen Air Vents Air Circulation Long-Lasting Comfort Widened Hook And Loop Design Automatic Adjustment Of Head Circumference Suitable For Babies At Different Stages Cloud Sense Wearing Baby Does Not Resist