Just so it’s holding everything in. And so their not flopping about as you. Have had serious trauma. If I can put it like that to yourself so it needs to heel properly without them swinging about and all sorts! And mainly to. Hold the implant in place.! When I was 4 weeks I started to let them free for. Like 4-5 hours but you can do it now have a break from the sports bra for a n hour or so as long as your not. Doing anything that will cause harm to them xx