I am not big chested so these bras have been everything for me! I mostly do cardio and have not had any issues with comfort. They are not padded which doesn’t bother me (easier laundry days) but if you want there are places to insert your own for more coverage. The material is soft and breathable for me. I used to get armpit rash with other brands but have had no issues with these—which is a dream!! I did size up to size 6 so the fit isn’t tight around the arms. For reference I’m 34A, size S in tops.