In reply to Eciton:
> What problem is the magnetic buckle solving? None
To give a different perspective, have you tried fumbling a helmet buckle together with numb fingers and thick gloves on? The magnets are great for guiding everything together in winter.
I've not yet had anything stick to mine, but it's something I'll bear in mind.
It's possibly also worth mentioning that my understanding of helmet fitting (climbing, bike etc) is that the helmet should be fitting firmly
before the strap is done up - ie using the yoke adjustment. Obviously it's not great if the strap comes undone, or can't do up in the first place, but it shouldn't be the only thing keeping it on your head.