Bubble head? I wear a HD black chrome half helmet http://www.harley-davidson.com/mcm/mcm_product.jsp?PRODUCT%3C%3Eprd_id=845524442004095&FOLDER%3C%3Efolder_id=2534374302285727&ASSORTMENT%3C%3East_id=2534374302285727&bmUID=1136032464095&bmLocale=en_US with a shield. I wear glasses and this is what I wear to accomodate them. If you buy a HD half helmet, never lose the neck curtain. HD will have no idea how to replace it.