Kendall & Kylie Jenner: Pom Pons Pair

Kylie Jenner gets a little silly on the track as she cheers for her high school team in Los Angeles on Friday night (October 21).

Joined by older sister Kendall, the girls changed up their short skirts for pants as the temp cooled.

PHOTOS: Check out the latest pics of Kendall Jenner

Kendall, 15, recently posted on her official site about her latest fashion craze: Strut This workout pants.

“I wear them everywhere!!! I recommend everyone go out and get a pair. They are soooo cute, and extremely comfy! LOVE LOVE LOVE them!” she wrote.