The World Triathlon Corporation announced it will be changing certain swimwear and wetsuit rules for all Ironman and Ironman 70.3 events starting in September of 2010. The major changes include an adjustment in the temperature at which wetsuits can be worn and the elimination of swimskins in non-wetsuit legal swims.

The amendments were made to further standardize rules in the Ironman/70.3 Series and ensure a fair playing field at events around the globe.

The changes will include the following:

Swimwear and swim apparel must be comprised of 100 percent textile material, such as nylon or lycra, and may not include rubberized material such as polyurethane or neoprene. Swimwear may not cover the neck or extend past the shoulders or knees. Swimwear may contain a zipper. A race kit or trisuit may be worn underneath swimwear.

Wetsuits cannot measure more than 5 millimeters thick.

Wetsuits may be worn in water temperatures up to and including 24.5 degrees Celsius/76.1 degrees Fahrenheit. Athletes who choose to wear a wetsuit in water temperatures exceeding 24.5 degrees C /76.1 degrees F will not be eligible for awards, including World Championship slots. Wetsuits will be prohibited in water temperatures greater than 28.8 degrees C/84 degrees F.

“Ironman recognizes the importance of showcasing the competitive element at all events. We believe these amendments place more emphasis on performance and function and less on technology, therefore staying true with the Ironman spirit,” says Ironman’s Head of Officials, Jimmy Riccitello.

Ironman’s rule changes are consistent with rule changes adopted by swimming and triathlons international governing bodies, FINA and ITU, respectively.