Any suggestions on a decent helmet I can fit into my saddlebag as a back up/rider helmet? I've seen some half helmets in stores for like 75 but again this is a back up or for a rider and one that I can fit in my saddle bag. I have a full face that flips up and that is what I will wear most of the time but I might wear the half for kicking around but most likely it is going be for the girl who says take me for a ride... So I'm looking for something under $50, as much under as possible, otherwise I can just go buy one in a store but I would like something that I feel like I'm protecting a rider as much as possible. A link would be great.