MPG Running/Workout Knot And Split Back Top

I loooove this top. I actually have it in multiple colors and ended up with two gray. I bought one of them on Poshmark thinking it was a different shade of gray, but they’re the same so I only need one. Not sure if this is my original or the newer one from Poshmark. The back has a knot type detail toward the top and then the back is split open down to the bottom. It’s fun to see your sports bras sticking out when you wear a pretty one.