This is my indoor hang setup during the winter. Just a small fleece blanket suspended from either end. I use a small tie in the middle to bundle up the ends of the blanket to create an air pocket. One one side i have a bungee cord to pick up slack and stretch out a bit for my feet.
I clip it up out of the way when I’m not using it. Usually I try to sink the hang points about 1ft from the ceiling. Trying to put most of the force down on the wall as opposed to pulling outwards. Gives a good, slack hang.