This is a competitive swimsuit made by SPEEDO, officially approved by FINA (International Swimming Federation) for official competitions. The low-resistance, water-repellent, and highly-stretchable material is a high-quality model that clears strict international certifications. The water repellency on the fabric surface is achieved through extremely fine uneven processing, which streamlines water flow, resulting in low resistance. This swimsuit is made of stretchy material that stretches well and fits the body. It also has cup hook receivers, so you can easily attach your own cups. The size is women's S. Because it is a competitive swimsuit, the fit may feel tighter compared to fitness swimsuits, but the arms are very easy to move, which is exactly what you'd expect from an official model. It has been stored after outgrowing it, and there is a feeling of use, such as from the fibers, from actual use in the water. Please understand this before purchasing. ■About FINA Approval■ There are very strict rules, such as the fabric of the swimsuit being less than ○mm and the buoyancy of the fabric itself being less than ○○. The FINA mark, a QR code on the back, is attached to swimsuits that pass those strict rules. There is a rule that records will not be officially recognized in international and official competitions if a swimsuit without the FINA mark is worn.