I sleep nekkid. Have for many, many years. I don't like PJs. So, when I hear a bump in the night, I have to cover before I find something for my feet. Unless I think it's really serious, then nekkid is going to have to do. Seeing 215 pounds of 65-year-old white guy
could be a greater deterrent than a weapon.

Fortunately, I keep a pair of what the Vietnamese call
fisherman pants right by my bed. They're the same thing "Charlie" wore when we fought them in the '60s and '70s--kind of like large, draw-string pajamas. They are very large in the waist, roomy legged cotton pants with a cotton belt sewed to the back. I can be in them and cinched up, ready to go in seconds.
I wear a pair of flip-flops on my feet. They live right beside the fisherman pants which lives adjacent to my Glock, which is immediately beside my tactical flashlight.
Just a couple of nights ago I had occasion to test the efficacy of my plan. I was out the door and checking the perimeter in under 30 seconds. Turned out to be a neighbor messing about in his shed in the middle of the night.
But to answer the original postulate, I wear flip-flops.
Crusader Rabbit