If you are making or altering a piece, these technical adjustments ensure the zipper works with your curves rather than against them:

: Never cut your back zipper allowance in a straight line. Your back is naturally curved; tapering the allowance at the waist prevents the fabric from bunching.

While there isn't a single definitive brand or guide named "Bustyzip," the concept refers to the specific challenges and solutions for busty women when dealing with zippered clothing. Whether you are sewing your own garments or looking for the best fits, managing zippers is a core part of achieving a polished, comfortable look.