They’re bib shorts. They are more comfortable than traditional cycling shorts as there is no waistband to pinch or roll.
Gotta be careful of not having a shirt, tho. When I was training for triathlon, I went out and ditched the shirt because it was so hot... got nearly 3rd degree burns on my back. The skin didn’t just blister, it liquefied. Was gross... lost a few t-shirts as the skin would bond to the shirt. Yeah...
Was a blessing, tho as I was a workaholic and had to miss a week of work, spent it all with my daughter who passed away not too long after. I’ll always treasure that time.
Sorry... anyway, yeah, they look silly, but they MAD comfy and if you’re gonna spend all those hours on the bike, you better believe that fashion means squat compared to comfort...
I like they he was using a heart monitor as well. That’s a ton of great data over a statistically significant period of time.