Have a look at my pics Jon, it’s a band you wear across your chest to keep the implant in place and support your muscle. My nurse told me not to wear bra at the same time as the bra pushes up and band pushes down to keep implant in its pocket.
My nipples are so sore from rubbing on clothes!! Trying to do what the surgeon says but do tempted to start wearing a bra for a few hours a day, feels weird walking outside with no bra on :-0