If you really think skid lids are the thinest you should check out http://www.carbonfiberhelmets.com/ There is no comparison to a skid lid.
I didn't mean I thought Skid Lid's were the thinnest I just like mine alot and for the price it is worth it. I looked hard at carbonfiberhelemts.com but couldn't justify spending that much money on something I couldn't try on.