I have two, a summer helmet, and a winter helmet. The winter helmet is a knock off copy of the summer helmet.

Summer helmet:
vintage Bell Tourlite
$10 Ebay
not until/unless I have to, then only if when I can find another one.

Winter helmet:
OGK knock of of a Bell Tourlite, with the vents taped
$5 at a yard sale
same as above

If I destroy one or the other, then which ever one is still around will wind up being worn year round, as opposed to being a summer or winter helmet.

I think the Bell Tourlite is/was the best looking helmet. The ones they make now just don't do it for me.