This is a sports bra from Victoria's Secret's sister brand, PINK Sport. Underbust: 56 cm. The underbust has some elasticity. It's made of rubber and stretches slightly. It has a gorgeous and very cute pattern. It's adorably mature. I'm selling it because the underbust is a little tight on me. I've only worn it 2-3 times. It has padding inside. It can also be removed. How about for fitness? Please purchase with the understanding that this is a used item. Basically, I do not accept returns or complaints. Price reduced.