This is a great idea @hybrid3.0 for @Hothead Headliners . Those windows also vibrate and the latches can rattle so an bit of damping and sound deadening would be a good thing.Mine is also on the way. Email corresponded with Mark and asked whether he will be developing a side window insulation kit as well for the SOT hardtops. Considering the response from the SOT headliner I hope a side window kit is soon to follow. I'm in the mid-west and it gets cold this time of year and hot in the summer so more insulation is better!