KEY FEATURES FINA Approved Internal taping system: for a sensation of powerful support and core stabilization. Twin-tape structure: on the back of the legs for a lifting effect to help hold a high body position even when fatigued. For maximum hip-height in the water. Carbon Cage fabric: a horizontal and vertical grid that surrounds specific muscle groups for very strong and durable all over muscle compression with a locked-in feel. OUTER SHELL: 52% Polyamide/47% Elastane/1% Carbon Fibre INSIDE LINING: 49% Polyamide/50% Elastane/1% Carbon Fibre The Mens Powerskin Carbon Core FX Jammer from Arena is a Fina Approved racing jammer that will help you to swim at your best for your race. You will feel additional core support, a tightness that still allows for freedom of movement and a lifting effect that keeps your body position high throughout your race. A new twin-tape structure for a leg lifting effect and our all over carbon cage material provide a powerful sensation of body stabilization. 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.”