We offer a wide variety of specialized Mylar Sun Screen Shades specifically designed for use on ships.  We offer two different materials:  GLAREX 5 (5 mil), and ALTRA GLARE (4 mil).  Both materials are Coast Guard approved, and meet all IMO requirements.  Both materials have a reflective metallic layer between two tinted layers that will totally reduce glare, and reflect heat back out the window, keeping your space much cooler.  Use Mylar Shades because lives depend on it!