I have yet to wear this suit on the track, however, I have tried it on and I cannot wait to ride it and break it in. I ride at Summit point in WV and I have a feeling that my confidence will increase with this suit! It feels amazing, extremely comfortable, and tight. To wear this suit, I will be barely be able to fit an underarmour layer. However, the inside of the suit is removable and washable. I am 5'3" and 135 pounds with an athletic build. I bought the smallest size I could. It is perfect. I have some room to add in the calve area, But it is very tight in the chest, waist, and arms. I may write another review after some riding this weekend.