These are exactly the type i use... and they work well... some say that i may need an outside, front wraparound for the winter for extra insulation... we will see...
My issue is that I want a little ventilation... and sometimes my wife wants more ventilation when i fart... ... so... the suction cups dont work for me... that said, its nice to know these exist as they may be good for hanging up laundry in the vanI use these clips each corner of the front window. They used to fall off in the middle of the night but with a clean and a little moisture they stay on overnight but still peel off easily with a fingernail under one edge. I find with condensation on a cold night the window is a mess anyway the following day so that doesn't bother me. I have a shammy leather covered sponge for wiping the front window in the mornings. The poppers would be better if I was brave enough to screw into the van lining. I'm still pleased with them and prefer them to the wet external blind type. View attachment 49140