Features： 1、The rider can enjoy the ride because of its design\u0027s ability to keep him cool during extended trips. Cycling helmets fit heads with a circumference of roughly 51-54cm. Additionally, it has 7- vents. 2、The size of the head circumference can be adjusted so that we can easily wear it. 3、The bicycle helmets are designed with an inner lining, which is cool and breathable. So we don\u0027t feel stuffy when wearing it. 4、Kids cycling helmets can not only protect us, but also allow us to enjoy cycling to the fullest. Its brim can effectively block sunlight. 5、The bicycle helmet is made of PC shell + EPS impact-resistant foam. It is very breathable and sweat-absorbent, soft, and skin-friendly. Specification： Features:  The rider can enjoy the ride because of its design's ability to keep him cool during extended trips. Cycling helmets fit heads with a circumference of roughly 51-54cm. Additionally, it has 7- vents. The size of the head circumference can be adjusted so that we can easily wear it. The bicycle helmets are designed with an inner lining, which is cool and breathable. So we don't feel stuffy when wearing it. Kids cycling helmets can not only protect us, but also allow us to enjoy cycling to the fullest. Its brim can effectively block sunlight. The bicycle helmet is made of PC shell + EPS impact-resistant foam. It is very breathable and sweat-absorbent, soft, and skin-friendly.  Specifications: Material: PC, EPS Color: Pink Purple/ Pink/ White Grey/ Blue/ Green/ Light Cyan (optional) Heads circumference: 51-54cm/ 20.1-21.3in Weight: 204g/ 7.2oz Package List: 1 * Kids Helmets Package List： 1 * Kids Helmets