Lincoln released a photo of their new 2013 MKZ Giant with it’s new retractable glass top, the glass top is not like any rooftop or sunroof. This glass top opens as deep as 2 feet and 2 and a half feet wide. The glass top has also been rated to 100 SPF, which means it will not cause any sunburn or skin damage without the driver or passengers permission. It has also been stated by Lincoln that the 5mm thick, more than 4 feet long and 3.7 feet wide glass retracts in under 10 seconds.