Jeez ClockworkOrange I can't remember the last time I saw anyone MTBing without a helmet! Mine saved my head last month, not by falling off but when I misjudged how much space I had to fit under a fallen tree - whammo!

Anyway enough of the lectures. You do need to try some on to find out if you have a Giro shaped head, a Met shaped head or something else. I seem to fit the very small Giros (I have an Animas) and will be looking to replace mine soon I think.

Have a look on CRC as they do good helmet offers, for example they are selling this years Giro Xen for £60 (should be £90) which is not bad looking for a helmet, thinking of getting one for myself especially at that price. They're helmet list is here:

http://www.chainreactioncycles.com/C...CategoryID=225

Please get one, once you do you'll feel naked biking without it.