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(Redirected from Under cap)
Undercaps can be seen underneath the top caps of the Canadian swimmers competing in the 10 km FINA/CNSG Marathon Swim World Series race at the 2019 Traversée internationale du lac St-Jean held in Quebec, Canada

noun - Undercap is a swim cap worn under another swim cap (top cap) by open water swimmers or competitive swimmers. The undercap can be either silicone, latex or lycra swim caps worn on the head.


Undercaps are worn for various reasons including increased warmth or fear of the top cap coming off during an open water swim.


swimming cap, bathing cap, bubble cap, neoprene cap, dome swim cap, top cap, under cap


Coined by Steven Munatones in August 2019.

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