FINA APPROVED Close Back Competition Swimsuit The JKeel swimsuits features a unique 3D structure, constructed using HT (High Tenacity) fibers and finished with bi-component plasma treatment: the sliding speed of the water molecules on the J-Keel is more than 20% faster than ever before. In addition to the 3D construction, the swimsuit features a double layer of fluorocarbon resin which, for the first time ever, ensures an astonishing water-repelling effect. Fabric: an other exclusive fabric created by J-Lab, based on HT (High Tenacity). Fibres: the swimsuit is constructed using ultrasound and heat welding processes, with the exclusive use of tapes with increased mechanical capacity. Production methods - Slider tunnel: a specially designed tunnel through which the jammer drawstring ties slide. Allows you to adjust the drawstring ties, which come pre-crossed under the tunnel upon purchase, to suit you, without the risk of snagging or tearing the fabric. Ergonomics: evolution of the FlexStripes compensation system. This improves the fit of the swimsuit, ensuring the athlete experiences maximum compression, but at the same time supporting movement progression, stroke after stroke. Treatment: Enhanced ACQUAsuACQUA (Italian for Water on Water) treatment. An exclusive plasma process makes the treatment twice as effective, thanks to the fluorocarbon resins used, which cling to the fabric and create a water film, just a few microns thick.