What is the size of a one-size-fits-all helmet?

[VanLena]

The one-size-fits-all helmet size ranges from 53 cm to 59 cm, and there is an adjustable fixture inside the helmet to secure the size. Therefore, it is important to measure the size when purchasing to avoid the hassle of returns. The size of a one-size-fits-all helmet is: The one-size-fits-all helmet size ranges from 53 cm to 59 cm, and there is an adjustable fixture inside the helmet to secure the size. Therefore, it is important to measure the size when purchasing to avoid the hassle of returns. Common helmet materials include: ABS, carbon fiber, fiberglass, and glass fiber. ABS offers excellent impact resistance, heat resistance, low-temperature resistance, chemical resistance, and electrical properties, with a particularly good surface gloss.