Women's Triathlon Trisuit Bottoms

Should I put on an additional suit to swim?

Yes … and no.

The neoprene suit provides buoyancy, an asset for the swim leg. Good to know: The French Triathlon Federation forbids isothermal swimsuits when the water temperature is above 75°F and makes them compulsory when the temperature goes below 61°F. Between 61 and 75°F, it's up to you.

What is the difference between a triathlon suit and a top + bottom?

A practical difference, not a technical one: with a separate top and bottom, pee breaks will be faster than with a suit. You can also change the combinations, for example use a cycling jersey, a running t-shirt, etc. In terms of comfort however, there's no difference between a top and bottom and a suit: the pad will provide comfort for the cycling portion.

Do you have to wear pants under these triathlon bottoms?

No, triathlon bottoms or the trisuit is worn without undergarments to avoid chafing.