Mizuno GX Sonic Stream - Engineered for Speed The New Mizuno GX Sonic Stream is designed for elite swimmers who demand technical precision and hydrodynamic dominance in the water. World Aquatics Approved: Approved by World Aquatics for national and international swimming competitions. World Aquatics approved racing swimsuits have a unique FINA barcode printed on the swimsuit, making it easily identifiable to swimming officials. 12 and Under Approved : Tech suit approved for 12 and under athletes based on USA Swimming rule. Officially stamped with 12 and under approval logo. Knit Material: Built with comfort and durability. Water Resistant: Water repellant fabric and coating for optimal speed through the water.