Had to fix it.
Considering some triathletes use them during the running portion. Take a look at this video from the Super League Triathlon back in September. If you want to, skip the video to the 4:50 or 4:52 mark, you will see. Vaporfly Next%. Bear in mind the running portion for this even is 3 x 2 k for a total of 6k. 8k the most when the format is changed.