Unique lululemon short sleeve bike shirt

I’m thinking this is a bike shirt, I’m not sure it’s so different than so many lulu items I’ve seen or owned. It has a unique neck line, a center waist band that’s flattering. Little cap sleeves and a little pocket on the bottom for your headphones to lace through. Truly one of a kind! I have it listed as size 4 but it could also be a smaller size 6. It fits like a small shirt, not a ton of stretch but some!