For what it is worth I went out and checked my Pop Top with and I.R. Gun. My Westy is parked out in the sun all day long.The current Temperature is 92 F. The driveway is reading 123 F. The Pop Top is reading 121 F at top outside. The inside with the windows open and   Top Pop open vents as well is reading 111 F. Last year I painted the top with reflective roof coating in and effort to cool the inside of the van, it felt as if it worked at the time , that's my story and I am sticking to it.Bill Witz 84 Westy Tiico