Mondo Knows Facts

Wetsuits are allowed only in cool water

They become compulsory below about 16 degrees Celsius for professionals Wetsuits add buoyancy and warmth, so the rules restrict them to keep the swim fair. Between roughly 16 and 20 degrees they are permitted but optional, and above 20 they are usually banned. Water temperature is measured on race morning at several points on the course. It sits in Mondo's sports collection, one of 200 facts that each trace back to the reference below.

Where this comes from

World Triathlon

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Tags: triathlon, wetsuit, rules

Wetsuits are allowed only in cool water: the short answers

Where does this come from, and can I check it?
They become compulsory below about 16 degrees Celsius for professionals. The figure is taken from World Triathlon, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a sports fact?
Yes. It sits on the Sports shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.