Join together
is a needlework technique which involves creating small in-out stitches with the purpose of firmly connect two material pieces together. This approach provides durability and prevents the fabric from fraying. The overcast can be used for a range of sewing projects, such as sewing the hem, stitching patches, or even making quilts. It provides a clean and expert look for the finished product.
Whipstitch definition of whipstitch by The Free Dictionary