This supplement is an abridged version of the third edition which is designed for individuals who currently own the first or second edition of Bare Essentials: Bras. While the third edition updated all aspects of the book, this supplement only highlights the major changes to drafting, sloper development and pattern manipulation. This also includes the new patterns for the 3rd edition, although the new patterns are also available to download for free on the website Porcelynne.comThe drafting information included in this book approaches drafting from a more mathematical approach. Draft for any shape and size. While the drafts from the first and second edition were thorough, the new approach factors into two additional body shape variations, the torso shape and the torso height.Grading is not included in this book. For grading updates, choose the full third edition rather than the supplement. This supplement is designed to work with the first two editions and does not include construction and specialty design modifications.