Temperature management during training is an important aspect that few athletes have discovered. New Ironman Triathlon World Record holder Jan Frodeno shows that it can give you the edge. The Cosinuss One is on sale now for 30% off in celebration of Frodeno's Ironman world record.

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Challenge Roth ROTH, GERMANY - JULY 17: (EDITORS NOTE: This image was created using digital filters) Jan Frodeno of Germany swims during the Challenge Triathlon Roth on July 17, 2016 in Roth, Germany. (Photo by Stephen Pond/Getty Images for Challenge Triathlon)



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