Mizuno's fastest suit yet. Engineered for high-speeds, the GX-Sonic V is built for swimmers seeking top performances. 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. GX-SONIC Series: Mizuno's most elite swim product, built for competition. Sonic Light Ribtex UW: Material designed for ideal speed conditions under water. Each panel is built with increased water repellency and compression. This engineering assists with a tight body line and increased hip elevation throughout the race. Sonic Line X: Mizuno's most updated cross shaped taping supports both up and down kick. Offers a hip lift sensation throughout the entire kick cycle. Compressive Material: Compressive panels engineered for body support and alignment throughout the race. Water Resistant: Water repellant fabric and coating for optimal speed through the water. Taped Seams