Women can wear a sports bra and compression shorts, or they can wear a swimsuit. If you don't want to, you don't have to wear a shirt under your wetsuit during the swim. After removing your wetsuit, you can change into any shirt and shorts to complete the last two legs of the event. However, if you plan to go for a run or work out after the swim, it will help keep you cool down too. The important thing is that you feel comfortable with what you're wearing while swimming. If you feel like you could do with some support, then a sports bra is right for you. Otherwise, a regular bra will do just fine when worn with a compression short under the wetsuit. As long as you are not exposing any unnecessary skin, you should be fine to wear a sports bra under a wetsuit. However, if you plan to exercise afterwards, then we recommend adding some floatation devices to your outfit. This will help keep you safe in the water if you happen to roll over.