I bought the Luceo Aero Tri Suit at St. George two days before the world championships! I had brought with me a different Wyn suit and the Zoot Ultra Aero kit which I wasn't totally sure I actually wanted to race in. So when I saw this one and spoke with Luke & Beth about the kit I was really excited to wear it on race day. I'm an XS in WYN and this kit did fit true to size, the arms were a little tight at the opening but I just fiddled around with it and got it to fit just right. I've worn this kit 3 times and have had great race results in it!