THREAD TENSION: Consistent thread tension is essential for a durable and flexible herringbone stitch. If the stitches are too tight, the fabric may pucker. If the stitches are too loose, the repair may lack stability.

Check the tension frequently while stitching, especially when repairing a slit or split seam, where fabric edges may shift.

Adjust as needed by gently pulling or loosening the thread to ensure the stitches lie flat without distorting the fabric.

Pause periodically to smooth the fabric and confirm the stitch tension is even along the repair.