List is incomplete. It seems to assume a relatively warm climate or expensive use of night-time home heating.
Thus: Long sleeves. Underwear under long trousers perhaps for sanitary purposes, but possibly for comfort.
There's probably also a few people who have socks they wear to bed if not also blindfolds or old-timey nightcaps, but I get why those things aren't in this graphic. Lack of long sleeves is more of a head-scratcher.
4'33" by John Cage
Preferably with me as far from the stage as possible. In fact, I'm staying home. Enjoy.