| Your current helmet does not fit you, put it in the bin now and never wear it again.....if it can do as you describe with a little bit of wind, imagine what would happen if it hit anything.....it would come clean off!!!
Fit is vital...'an Arai head'....check before you buy
Arai or Shoei are 'the chosen ones', but there are plenty of other good makes obviously. Buy tri-comosite or equivelant
£350 is ok, but not great...J&S had some great deals on Arai in MCN last month.
I know a small Arai fits me as I've had a few, so usually get one off a website, usually a UK supplier somewhere, but check how old it is and that it has the EC2205 stamp and an ACU sticker if you ever plan to use it on track.
I bought my new helmet, an Arai RX7 Gibernau rep off a website from a shop in Japan. Very cheap, but no ACU sticker, although easy to get ahold of, but the main thing is the fit is different to European heads and it did press on my forehead for the first few wears (Doh!), now perfect.
WeeJohnyB | 
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