Sophie Caldwell of the United States skis with a sleeveless top as temperatures go well over the freezing point during the women's 10K classical-style cross-country race at the 2014 Winter Olympics, Thursday, Feb. 13, 2014, in Krasnaya Polyana, Russia. (AP Photo/Matthias Schrader)

Photo by: Matthias Schrader

Sophie Caldwell of the United States skis with a sleeveless top as temperatures go well over the freezing point during the women's 10K classical-style cross-country race at the 2014 Winter Olympics, Thursday, Feb. 13, 2014, in Krasnaya Polyana, Russia. (AP Photo/Matthias Schrader)