Bulve.zip -

: Occurs when a rigid zipper is sewn into stretchy fabric (like jersey or spandex) without stabilization.

Based on your query, there appears to be a slight typo. You are likely looking for information regarding (sometimes referred to as zipper puckering) or possibly bulve , which is an older term for certain types of bulb vegetables or specialized anatomical structures. 1. Zip Bulge (Zipper Puckering) bulve.zip

: A straight zipper placed on a curved seam, such as the lower back, often creates a bulge because it doesn't follow the natural "S" curve of the spine. : Occurs when a rigid zipper is sewn

: Pulling or stretching the fabric while sewing the zipper in can cause it to "wave" once released. such as the lower back