Hi
I’ve got both, the m&s sports bra and primary one, personally I’m not a big fun of a primark one… I wear it during the night with my breast band, but during the day I need more support so m&s. I know that it’s a bit tight, but I tried today wearing primark bra during the day and I feel horrible, even though I’m 11days post op. The primark bra is so easy to stretch that I was putting it through my legs lol 🙂 hope this will help xx