This is a competitive swimming suit made by Arena. It's made of low-resistance, water-repellent, and highly stretchable material. The water repellency on the fabric surface is achieved through extremely fine uneven processing, which streamlines the water flow to reduce resistance. It's a stretchy swimsuit that stretches well and fits the body. Plus, it has cup hook receivers, so you can easily attach your own cups. The size is women's M. Because it's a competitive swimsuit, the fit may feel tighter compared to fitness swimsuits, but the arms are very easy to move, which is typical of Arena models. There is a sense of use, such as wear and tear of the fibers and aging, from actual use in the water. Please understand this before purchasing. #Halloween on Mercari