Athletes competing for Great Britain and Northern Ireland have the option to wear two different coloured kits at the 2025 World Championships in Tokyo.
It has caused some confusion for viewers at home, especially in the men’s 1500m semi-finals when Josh Kerr sported a blue and white striped jersey, while team-mate Jake Wightman wore a white sleeveless top.
A British Athletics spokesperson said athletes were given the choice to help their “individual needs, performance, preferences and comfort”.
The blue kit is designed with aerodynamic sprint features in mind, while the white sleeveless top and shorts provide a lighter, traditional option for non-sprint athletes.
There is also a “dedicated finals kit” reserved for major championship moments, according to British Athletics.
Thanks to Susan in Nottingham and David in Derby for the question.
This article is the latest from BBC Sport’s Ask Me Anything team.
BBC News
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