2XU Men's Compression Tri Singlet - High-Performance Triathlon Top for Cycling, Running & Swimming - Moisture-Wicking & Breathable Workout Shirt for Athletes

I ordered several different tri singlets through Amazon before settling on this 2XU model. Not only is it comfortable to wear with no abrasion points, it seems like it is well-constructed and will last a long time. I liked it so much I bought two. They are great for cycling class at the gym so you can manage your cooling using the zipper, and it is somewhat fashionable to wear. I have also worn it while running up to 10 miles and have no complaints. When I finally get into doing triathlons I am more than ready to go!About the fit... it DOES run a bit small, but I think that is the intent of the product. The compression seems targeted, though, so it's not like it impedes breathing or anything.