Typically on your average day of lounging, most people wear something very comfortable that they can just relax in all day.
For me, my typical lazy day is just a t-shirt, some sweat pants, and some comfy socks. I can wear this outfit out anywhere and feel good about myself. I tend to wear my grey Nike sweats because of the comfort and the feeling of fabric. I feel as though I am walking on a cloud.
Also with lazy days comes being lazy, so I typically spend the days inside watching Netflix, playing NBA 2k16, doing some homework if I have any and watching some tv. I try to stay in the house as much as possible during last days but the one thing that everyone must do during their lazy day is take a nap and catch up on some sleep. You can never go wrong there.