I have a 661 mullet helmet which is bmx style and its really solid and comfortable, however i don't know if this happens with all style helmets but it gets extremely hot as there are not quite as many vents in bmx style helmets. I have had mine for just over 3 years now without crashing badly on it so i dont really know how strong it actually is but it does feel solid. Overall a superb looking lid, i'd recommend to anyone.