Streamline Sleeveless Swimskin
First of all, the sizing chart isn't quite right (at least for me). They are sizing these at least 1 size smaller than they actually are - meaning, if you order based on their chart, it will likely be too small. Once I got the larger size, it still was VERY tight- if I am to put the tri suit under this, it is really restricting - so much so, that I found it difficult to breathe while swimming due to chest constriction.