I found button up shirts really annoying to undo (which is unfortuate 'cause I bought 3 shirts especially for feeding). I bought 2 Glamourmom nursing singlets on the internet that I still wear now even though DS almost never has a feed during the day, mostly I wore t-shirts & pulled them up - if you don't want to expose your tummy you can wear a belly band. I felt more exposed with the button up shirts than t-shirts 'cause the top of my breast was exposed.