Size XS - Suggest for infant/toddler age 1-3 years old
Size S - Suggest for kids age 4-8 years old
Size M/L - Suggest for kids/Teens age over 5 years old
Dual Certificate - US standard CPSC 1203 & ASTM 1447 verified.
Comfort and Convenience -360° inner pads and removable and washable.
Adjustment System - With dial turn ring, easily to adjust head range.
Cooling System - 11 air vents & 6 cooling channels
No Risk To Buy : If you have any problems or questions, please connect us, we are committed to providing better products and services to children and parents.