Kim Kardashian West’s shapewear brand, Skims, will provide the official underwear, loungewear and pajamas for female American athletes at the Tokyo Olympic and Paralympic Games this summer.

Ms. Kardashian West announced the partnership on Monday, sharing images of Team U.S.A. athletes modeling the collection on Instagram.

“Ever since I was 10 years old, I’ve heard every single detail about the Olympics,” Ms. Kardashian West wrote in the post, alluding to Caitlyn Jenner, who won a gold medal in the decathlon event at the 1976 Olympic Games and was married to her mother, Kris Jenner. “When I received the call inviting Skims to be a part of @TeamUSA ??, every moment I’ve spent admiring the strength and energy of the Olympians from the sidelines came full circle.”

Since 2008, Ralph Lauren has designed the opening and closing ceremony looks for Team U.S.A. It’s also typical for Nike to provide garments that Olympians wear to compete and receive their medals, including sports bras and spandex shorts.

But an official underwear outfitter?

Cassidy Krug, a diver in the 2012 Summer Olympics, said in an email that Nike and Ralph Lauren had provided her fellow athletes with more than 80 items in total. “As far as I can remember, no underwear or pjs from either,” she wrote.

That said, official underwear for Olympians is not entirely unheard-of. Jockey, for instance, is the official supplier of the Australian Olympic and Paralympic Teams when it comes to undies.