mjr wrote:Please check your helmet manual before potentially negating any protection by wearing another hat underneath it - or worse, a helmet that slips off could easily cause worse injuries than no helmet. Many manufacturers specifically say not to do it.
A few examples:Kask
: "Never wear anything under your helmet except for a winter cap accessory specifically designed for your helmet and supplied by your helmet manufacturer." (way to corner that winter cap market, Kask!)Trek/Bontrager
: "Anything between your head and the helmet can reduce the protection. A cap, scarf, or even some high-volume hairstyles might allow the helmet to move during an impact. Barrettes, headphones, or anything else under your helmet can injure you if the helmet is impacted."Giant
: "YOU SHOULD NEVER ... Wear anything under your helmet"Specialized
"Do not wear anything underneath your helmet, such as a cap, hood, bundled hair, headphones, barrettes, as the helmet may loosen or come off."Bell
YOU SHOULD NEVER:
"5. Wear anything under your helmet."Giro
"4) DON’T Wear anything hard or sharp under your helmet."
AndyK wrote:Not my helmet manual (Kask) or the couple of others I just found on Google.
Kask generally do now (see above) although I didn't find a manual specifically for the Mojito.
I wouldn't buy a Kask because I've had the ASA get an advert for the Kask Mojito withdrawn because it made safety claims they couldn't substantiate. It's maybe second only to Met (one model failed a Which? test and the company response was completely unsatisfactory) as a brand I'd advise against.
AndyK wrote:Obviously bulky headgear should be avoided (baseball caps especially) but a close-fitting cover with flat seams, like a merino beanie or Buff, effectively makes your head a little bit bigger. So long as that increased head size remains within the helmet's design limits, it should make little difference.
No, even a close-fitting cover with flat seams can help a helmet to slide around and not provide the designed impact protection in a crash. Please follow the manufacturer's advice and tell others to do so. Telling others to still use a helmet but to ignore the maker's instructions is a logically-inconsistent position: if you think the makers know what they're doing, then you should follow their advice; if you think the makers don't know what they're doing, then why would you trust their products?
Or is this a deliberate attempt to kill off a few helmet users and help the anti-helmet argument? That would be pretty low and IMO misguided.