Free Shipping Anonymous Delivery This is a children's bicycle helmet (kid's helmet). Target age: 5 years and older Head circumference: S-M (adjustable within the range of 50-58 cm) Weight: 200 grams Ventilation holes: 10 【High-Quality ABS for Ultra-Lightweight】 Made of high-quality ABS, which can effectively reduce impact and prevent injuries. Because it is an ultra-lightweight material, the total weight is kept within 200 grams, so children can use it without worrying about the weight. 【High-Density EPS for Impact Resistance】 Made of high-density EPS material, it is lightweight and dense. It has high impact resistance and can ensure the strength of the helmet. It feels more comfortable and will protect your child's head from all directions. 【Excellent Breathability】 With 10 ventilation holes, it efficiently releases heat and stuffiness trapped inside the helmet. It is less likely to get stuffy even in the summer. The streamlined design effectively reduces air resistance. 【Wide Range of Size Adjustment】 The head circumference can be adjusted within the range of 50-58cm. It is convenient to put on and take off with a one-touch buckle, and you can adjust the tightness with the adjuster. Although it is a used item, it was hardly used and the size was outgrown, so I don't think there are any noticeable stains. There are some scratches, so please check the photos. It has been stored by an individual. Immediate purchase is possible. Knee, elbow, and palm protectors are also included. They were hardly used, maybe the first few times. Please check the photos and understand that this is a used item before purchasing.