TYR Women's Avictor Prelude Closed Back Swimsuit Born out of a collaboration between the industry's top experts and the world's most elite swimmers, the TYR Avictor Closed Back Swimsuit is TYR's fastest, most innovative technical swimsuit. Showcasing an unprecedented combination of advanced features, this FINA-approved technical suit maximizes performance and gives athletes the ultimate advantage over their rivals. Hydrosphere Technology works in harmony with a swimmer's natural abilities in order to optimize body positioning in the water. Ground-breaking technology causes water to surround the fabric of the swimsuit, creating a visible hydrospheric effect. As a result of maximized positioning, drag is reduced and speed and efficiency are boosted.