Size - Head Size Conversion:
S: 52 - 55 cm, M: 55-59 cm
EN 1078 standard:
Complies with standard EN 1078 for bikes, inline skates and skateboards.EN1078 is a European standard regarding testing methods and requirements for "cycling, skateboarding, and skating" helmets.
This standard covers the following aspects: construction, including field of vision, shock absorption properties, retention system features including the chinstrap and tightening devices, and marking and information.