FEATURES World Aquatics approved Designed for precision and hydrodynamic performance in the water Designed for optimal compression, muscle support and comfort Hydrophobic treatment of fabric minimises water absorption and resistance in the water Fabric - 76% Polyamide 24% Elastane The Powerskin Impulso Men's Jammer from Arena with Fina approval, have improved hydrodynamics to ensure that your training sessions have reduced drag with minimal water absorption. These black jammers featuring teal stitching are made with a hydrophobic, woven fabric. The woven structure ensures balanced muscle support and compression, while the flatlock seams offer flexibility and a streamlined surface. They are World Aquatics approved. In order to ensure that your product provides you with the best possible performance for a long time to come, the following precautions are recommended: Rinse immediately after use, in non-chlorinated water Do not leave the wet swimsuit in a bag or other container for a long time Do not expose the wet swimsuit in a bag or other container to direct sunlight Wash with detergents suitable for delicate clothes Air-dry hung up and away from heat sources “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.” 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