Triathlon Clothing by De Soto Sports. De Soto triathlon clothing is one of the original brands. Designed by Emlito De Soto, an avid triathlete, the De Soto Triathlon clothing line is extremely comfortable and designed to get you through the swim, bike and run. They have split their line into Carrera, Forza, and Riviera lines. The Forza and Riviera lines are designed for long distance races and training. The Carerra line is for shorter races and training.