"On August 8, 2016 Nike aired a groundbreaking new ad during prime-time Olympic coverage. The ad gives a glimpse into Mosier's life, the questions he faces, and what motivates him to keep pushing forward. It's part of Nike's "Unlimited" campaign, which also features the likes of soccer star Alex Morgan, tennis champion Serena Williams, gymnastics phenom Simone Biles, and others.
In the video, Mosier confronts some of the unique uncertainties he faces as a trans athlete. Despite the unknown, he pushes forward."
Read more about the background to this story at Upworthy: Why it matters Nike is putting trans athlete Chris Mosier front and center in this new ad.