Well bras mostly. Before anyone reports me I am a frequent poster and not an undewear troll. I wondered what is comfortable for people. Over time I've become less and less comfortable in a traditional strap and underwire bra. I moved onto ones without underwire but despite having them measured I always felt uncomfortable in whatever I wore.
Now I am in my late thirties I have been doing some general reading about how traditional bras prevent you from using your pectoral muscles and nerve endings etc to the fullest as they are not "working" so to speak and the recommendation is to use a bandau or sports style bra that supports you but lets them move.
I have discovered a sort of sports style crop top in Sainsburys and although they look a little orthopedic. I am comfortable all day and I don't have breast pain or cutting in marks on my shoulders. What do other people use and why?