Olympic swimmers wear two caps to keep their goggles secure
Elite swimmers layer two silicone or latex caps to lock their goggles firmly in place and create a smooth, hydrodynamic surface that shaves precious milliseconds off their race times.
Olympic swimmers sandwich their goggle straps between two separate swim caps to ensure their eyewear stays perfectly still during high-speed dives and turns. The inner cap, usually made of latex, grips the head, while the outer silicone cap smooths out wrinkles and covers the goggle straps to reduce drag.
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