Cycling caps
Recently I bought a Walz cycling cap, and while it is a well-made cranial accessory, I guess I just don't "get it" from a functionality standpoint.
If I wear it brim forward and down, I can't see in front of me without craning my neck.
If I wear it brim forward and up, it forces my helmet back at a jaunty angle, not unlike that which you see on many children.
If I wear it brim backwards, the elastic digs painfully into my forehead.
I'm forced to conclude that helmets have made caps obsolete. It just doesn't work.