2. PJs Can Help Prevent Illness
Along the same line of thinking, the same source notes that wearing pajamas can actually lower your risk of getting a cold or flu. This is because if you’re in the buff and you accidentally knock the blankets off yourself (or your partner steals them), you may get a chill.
The trouble is you might not wake right away to notice that you’re frigid. If you have pajamas on, then you don’t have to worry about any night bandits robbing you of your warmth. Being uncovered in a chilly room “is a perfect way to get a cold” according to WebAdvice.