""" Available Sizes: For a perfect fit, please measure the circumference of your head starting from the middle of your forehead to ensure you choose the right size. Size S is suitable for 48-54 cm, recommended for ages 3-8 years old; Size M is suitable for 55-57 cm, recommended for ages 8-13 years old. Impact Resistance: This kids skating helmet is shock-absorbing and impact-resistant. The material uses tough and durable ABS and EPS foam, which helps absorb impact and protect the head during impact. The helmet is CE certified and is an excellent safety protection for outdoor sports such as skating and cycling.Awesome Ventilation System: Thanks to 11 multi-vents, special aerodynamic design and breathable foam, the skateboard helmet helps reduce sweating and keeps you cool even during intense physical exercise, which is considered a cool helmet for skateboarding or roller skatingAdjustable: This sports protective helmet has two adjustable straps and buckles for fixing and adjusting the size, which can be flexibly adapted to different sizes of children. It can be adjusted to fit growing children."""