FEATURES FINA-approved boys' racing swimsuit - streamlines the body from waist to knees into a hydrodynamic shape with minimized drag Shell fabric - with increased stretch and durable compression lining for unrestricted movement and targeted muscle support Strategic placement of ergonomic flatlock seams - keeps the body lifted underwater Fabric - 71% polyamide 29% elastane The Fina-approved Arena Boys Powerskin ST 2.0 Jammers will give fantastic performance and flexibility with their compression on the core and legs and knitted fabric with low-profile seams. *Please note this is a specialised piece of compression swimwear designed for athletes. If you are unsure whether this will be suitable please get in touch with our customer services team “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.”