Powerskin ST is a highly performing racing swimsuit, a powerful knitted fabric that guarantees strong compression as well as excellent durability in chlorinated water.Powerskin ST is designed to deliver an excellent level of performance, at a particularly competitive price point, thus offering outstanding value to all swimmers, from beginners to champions. These swimsuits have FINA approval. We sell the European Arena Racing Swimsuits which often feature an additional manufacturer's logo when compared to the American varieties. Other than the size of the logos, the suits are identical. Please be aware that the additional logo on Arena's European Racing Suits may exceed the 2.25 square inches of logo allowed in USA competitions. NFHS (The National Federation of State High School Associations) and NCCA (The National Collegiate Athletic Association) have rules on swimsuit branding and these suits are not compliant with the branding restrictions of these organizations. They are however fully compliant with UK, European and the rest of the world's regulations.