I don't want to piss Seedy off any more by posting in his thread so I decided to start this one, I hope this is the right forum to ask this. Did a search on 'second hand helmets', typical crappy search, the word 'second' was excluded for being too common, couldn't find any information on second hand helmets. My question is, why do people reckon second hand helmets are worthless? Is the only reason because there is no way of knowing the history of the helmet? What if you do know the history of a helmet and know for a fact that it's never been banged (double entendre not intended)? I read in the VicRoads hand book that helmets mould to the shape of the wearer's head, and once this moulding process has finished, any body else wearing the helmet will have limited protection. Is this true, or is this just a crock of shit like Seedy who is more knowledgeable than me says? I'm asking this question because I'm interested in buying Seedy's helmet as a spare helmet/helmet for my girlfriend. There's no way I'm putting that helmet on my girlfriend's head unless I know it will protect her in the event of a crash, but I can't afford to buy a brand new one either. Please no comments like "you shouldn't get your girlfriend on the back of your bike until you can afford to buy her brand new gear", "you suck at riding you would be a dangerous pillion carrier", etc.