Lululemon Free to Be bra tank size 4 lavender

This Lululemon top is a two-in-one with a built-in bra with strappy back. It is well loved, with the armpit area/bra showing wear - this area has some staining (see photos). The rest of the tank is in great condition. I haven’t tried treating the stains, so they may come out with some TLC! Bra pads not included. Size 4. Not sure the exact style name, but the strappy bra is similar to Serene and Energy bra styles.