Men's GX-Sonic III ST Jammer Swimsuit
Item 570001

Buy from Mizuno USA for a product engineered specifically for the North American Market. Available exclusively online.

Select a Color
Select a Size
Store Locator Tell A Friend

The Mizuno men's GX-Sonic III ST competition jammer is designed and equipped for speed.

The Sprinter (ST) model is designed exclusively for short distance sprints. The Sonic Ribtex is designed to compress and support the hamstrings. The suit supports up-kicks through its proprietary design, cutting pattern and seams allowing you to maintain a streamlined posture through the entire race, keeping your legs fresh to the finish!

For information on team orders of 12 suits or more, please click here.

Sizing Chart:

Waist\Hip (inches) 32 - 33½ 33½ - 34½ 34½ - 35½ 35½ - 37 37 - 38½ 38½ - 39½ 39½ - 40½
26½ - 27 2XS 2XS XS
27½ - 29½ XS XS XS S
29½ - 31½ S S S M
31 - 33 M M M L
32½ - 34½ L L L XL
34 - 36 XL XL XL


*Note: These elite tech suits are engineered to fit very tightly, like another layer of skin.

If you have any questions about your size, please contact customer service.

Key Features:

  • Sonic Light Ribtex: Speed enters a new dimension.  In addition to helping compression, Mizuno's proprietary material has an uneven surface, which reduces surface friction with water up to 9%.
  • Sonic Line Design: Created through proprietary dynamic analysis of muscle load during swimming.  The balance between strength, support and ease of movement is determined through musculoskeletal simulation.
  • Expanded Area of Support: Support areas have been extended down the hamstrings for streamlined swimming in new dimensions with the series' largest ever support areas.
  • FINA Approved: Approved by FINA for National and International Swimming Competitions. FINA Approved racing swimsuits have a unique FINA barcode printed on the swimsuit, making it easily identifiable to swimming officials.
  • Please note: The logo size on colorway Royal-White (5200) does not meet California High School standards.