I bought this to wear to a wedding, so it had to last all day. I tested it prior to the wedding for 8 hours and it didn’t budge. It’s not a bra you have to constantly adjust or pull up as it stays where it should. At the wedding I was responsible for my 4 month old baby granddaughter so worrying about my bra I did not need! It did a superb job and as an added bonus it made the girls stand up and look amazing! I bought my regular size and it fits perfectly.