The swimming discipline sometimes requires a wetsuit. Here is a listing of the companies that produce wetsuits and speed suit for the triathlon market.
| Comapny | Website |
| 2XU | www.2xu.com |
| Aquaman | www.aquamantri.com |
| Aqua Sphere | www.aquasphereswim.com |
| Blue Seventy | www.blueseventy.com |
| Camaro | www.camaro.at |
| De Soto Sport | www.desotosport.com |
| Fit2Race | www.f2r.com |
| Foor Wetsuits | www.foor.co.uk |
| Nineteen Wetsuits | www.nineteenwetsuits.com |
| Orca | www.orca.com |
| ProMotion Wetsuits | www.wetsuit.com |
| Quintana Roo | www.rooworld.com |
| Rocket Science Sports | www.rocketsciencesports.com |
| Sailfish | www.sailfish.com |
| Snugg Wetsuits | www.snuggwetsuits.co.uk |
| Terrapin | www.terrapinwetsuits.com |
| Xterra Wetsuits | www.xterrawetsuits.com |
| Zoot Sports | www.zootsports.com |
