I have one now that is the one layer oatmeal cashmere and the inner layer is something thinner (I forget what). I haven't tried it overnight yet. Here is my question - I am waiting for two double layer oatmeal cashmeres to come. Would these work overnight? I use Nighty Newts as our nighttime diaper. Also, for anyone that has a cover like this is it pretty trim in comparison to the one I already have? Thanks!