Last week, Under Armour unveiled red, white and blue uniforms for the USA men's and women's gymnastics teams at the Olympics this summer in Rio de Janeiro.
The company said the uniforms have extra compression to help increase blood flow. Stars figure prominently in the design.
But Under Armour didn't unveil all of the gymnastics uniforms.
"We're holding them back so there is the element of surprise at the Games," said Adam Clement, senior creative director of team sports.
Because gymnasts are judged individually, their sport is different than many other competitions. The athletes' uniforms vary based on the specific competition. The designs are part of the performance, and Under Armour didn't want to telegraph everything in advance.
But some details were disclosed.
"Were using navy and red and white—we have some in what's called Olympic blue," Clement said.
Several websites quickly offered reviews. One site said the uniforms "added embellishments and experimented with a color palette."
Under Armour says it is working with 32 countries — including the United States, Canada, Mexico, Great Britain and Japan — on a wide range of Olympic sports.
Each nation's uniform design evokes that country in some way.
It's stars for the United States and a maple leaf for Canada. For the host country, Brazil, Under Armour pulled in parts of the nation's flag for the design.