This is the basic Front Bust Dart or FBA or Side Bust Dart. There are a lot of names, but this dart is magical and I mean that. This is one of my main secret weapons for fitting that I've used for decades. If you have a 1. large bust, 2. a large differential between your waist and bust (like Dolly Parton) or 3. A large chest and shoulders, this is a must fitting technique for you to have proper shoulder fitting and proper bust fitting. And it's not that hard. This includes step-by-step instructions and a video that are in a downloadable pdf document so you will need Adobe PDF Reader or Foxit PDF Reader or another PDF Reader to view the document. Within the document are all the links to videos and downloads. You keep the document forever.