Push performance to the limit in TYR Women’s Thresher® Aeroback Short John Technology. The Thresher Hyperblitz Aeroback Short John is FINA approved for all levels (or all ages) of swimmers and is approved as a non-restrictive racing suit for Swimmers 12 years and younger for competing. The Hyperblitz Aeroback Short John features a medium neckline, sleek and flexible straps with an open back and gel elastic around the knees making it ideal for athletes who want comfortable coverage during every swim.   The Thresher Hyperblitz fabric is endowed with high compression action, it offers extraordinary elasticity, optimal muscular compression, an excellent fit and great coverage, and is also exceptionally breathable. The Hyperblitz can correctly sustain muscles, increasing efficiency of movement and reducing muscle fatigue.    Embedded hydrophobic fiber for reduced drag.  Core stabilization.  360° stretch and mobility.  Fabrication: 71% nylon / 29% Lycra spandex.