The less you have to change, the better! Yes, several companies make shorts that you can swim, bike, and run in(Tri-Shorts). Go to a tri equipment website or store. You'll see several combinations that you can use. Try to find something that you'll be comfortable in for the swim, bike, and the run. For example, I hate to run in a bike shirt. I find a shirt that I like doing both in so I don't have to change. The easier and simpler you make your transitions, the more time you can save. Bob