Instead of the white, shiny, and plasticky feel and look of vinyl, Infinity from Marvin patented an amazing co-extruded acrylic cap. The acrylic cap is 3x thicker than a painted finish. It is the first and only exterior finish on a window that is verified by AAMA’s 624-10 & 625-10 rating. This is the highest rated exterior finish that exists. You need this type of product in our extreme weather!