Puff sleeve long sleeve crop top (WILL STEAM BEFORE SENDING OUT)

I can't remember what this shirt is called and it's no longer available at Aritzia as I purchased it in 2019. I wanted it so badly at the time that I bought a size M even though I prefer the fit of a small (small and extra small were sold out) for a long sleeve crop top, but I do wish it was tighter and as a result I've only worn it twice. It has a really nice material - very heavy and expensive feeling.