HJ said:
They are all ridiculous, and utterly pointless, the simple answer is not to bother wearing one...
See
cyclehelmets.org for more information.
I know that the jury is still out on the efficacy of cycle helmets, but it stands to reason that they do at least provide
some protection from injury and that's good enough for me. (Injury = pain, regardless of how serious the injury, and I've no wish to risk injury, serious or not).
I've worn a helmet ever since I got t-boned by a car in 2005 and suffered a broken cheek bone, fractured skull and minor brain hemorrhage. I wasn't wearing a helmet at the time, and I doubt that if I had it wouldn't have saved me from a fractured skull because of the severity of the impact.
But last year I came off whilst going round a corner in heavy rain. Luckily I wasn't badly hurt and managed to ride home. When I got home I noticed that the helmet had a large dint and a split from where my head hit the edge of the kerb - if I hadn't had a helmet on then there can be no doubt that I would have sustained another head injury...
As it stands there is no legal requirement in this country to wear helmets, but I wonder how long it will be before insurance companies try to use the failure to wear a helmet to as an excuse to (further) reduce compensation payouts.
With some of the poorly-educated motorists I come across every day, it's suicidal not to consider protection.