they don't loosen over the day, but your body does and makes it feel tighter toward the end of the day. more like a ring than a shoe they do loosen over time.

they don't loosen over the day, but your body does and makes it feel tighter toward the end of the day. more like a ring than a shoe they do loosen over time. most bras have 3-4 hooks, you start on the loosest and the only reasons you use the tightest is you got a bad fit or it's near time to throw it out