The State Department is telling American athletes competing in the upcoming Sochi Winter Olympics to avoid wearing team gear outside the games’ venues.

The memo, reported by The Wall Street Journal, details steps athletes can take to ensure their safety during the games, cautions them to avoid wearing team colors too prominently outside of the 1,500-mile so-called “Ring of Steel” security perimeter established by Russian security forces.

The uniforms that American athletes will wear, by designer Ralph Lauren, feature a knit patchwork cardigan emblazoned with big stars, an American flag, and the Olympic rings.

“The U.S. Department of State has advised that wearing conspicuous Team USA clothing in non-accredited areas may put your personal safety at greater risk,” said the memo, which was reviewed by The Wall Street Journal.