We had summer library reading programs. I just liked reading and the library was cooled (not sure if it was a water cooler or air conditioning). Spending an afternoon lying on my back in the aisle of the book I was reading was heaven! Every so often a passing librarian would see me and ask if I was comfy. I was.
Most winter coats (in order to keep the outside out) don’t allow air flow or moisture to get in or out so a sandwich would be hermetically sealed inside until unfolded/unwrapped/unzipped etc.
I figured southern hemisphere when you said summer.