Don’t tamped with the helmet

Make no modification and never drill holes in the shell or cut the inner liner. This can seriously weaken the helmet.

Helmets are designed to absorb one impact

A helmet only works once, after it has protected you from a major impact, you must get a new one. An impact or fall could seriously impair the safety of your helmet even if there is no visible damage. The shock absorber inside the helmets is made of polystyrene. During an impact or fall, this polystyrene shell is compressed leaving a gap between the inner and outer shell of the helmet. The helmet no longer has the ability to absorb further impacts. Never wear a helmet that has sustained an impact of any sort.