I've looked at that outfit too. It's so adorable!!! That's from the Etsy Iglow Running store, right? She has some fantastic stuff. I briefly tried to talk my DH into the Hercules shirt she has and I was going to hit her up about making a Megera outfit, but decided the cost was too much, and given I lack any skills as a seamstress I know making it myself is out of the question.
We had a group of guys in chimney sweep outfits that we saw multiple times during the WDW marathon in January. They looked amazing. I could never run in the outfits they had on, but man did I admire them for doing it. I thought they looked wonderful. This shot was while they were waiting in line behind us to get a picture with Mary herself.