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This guide demonstrates how to do a hand sewn herringbone stitch to repair a split seam on a Patagonia® fleece jacket. The herringbone stitch is ideal for reinforcing seams on stretch fabrics or creating flexible, decorative finishes with its crisscross design.
Hand sewn repairs are a fun and effective way to extend the life of gear at home. DIYs repair won't void the Patagonia warranty—they're actually encouraged!
Patagonia items can also be taken in to a local retail store for repair evaluation or sent in to Patagonia through their mail-in repair service.
Let's get fixing!
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            Locate the damaged area and trim away any loose or hanging threads. 
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            If necessary, pin the seam together so that it stays in place during stitching. 
 
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            The herringbone stitch follows two parallel lines, with the thread creating a crisscross pattern between them. 
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            Before beginning, determine: 
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            Stitch Width - The distance between the two parallel stitch lines. Mark both lines with chalk or heat-erasable pen. 
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            Diagonal Stitch Length - The length of the diagonal stitch moving from one stitch line to the other that creates the crosshatch pattern. 
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            Backstitch Length - The length of the small backstitch that secures each diagonal stitch. 
 
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            Thread the needle with a length of thread approximately 24 inches (~61 cm) and tie a knot at one end of the thread. For more details see Needles and Thread. 
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            From the backside, insert the needle through to the front at a marked stitch line. Overlap any existing stitching by at least 1/2 inch (~13 mm). 
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            Pull the thread through until the knot lies flush against the back of the fabric. 
 
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            On the front side, move the needle diagonally across the seam in the direction of the stitch path. 
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            Insert the needle into the opposing stitch line at the Diagonal Stitch Length determined in Step 3. 
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            Make a small stitch backwards along the marked stitch line with the Backstitch Length determined in Step 3. 
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            Pull the thread through. 
 
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            Move diagonally across the seam again. 
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            Insert the needle, make a backstitch, and pull the thread through. 
 
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            Repeat the diagonal and backstitch sequence, forming a crisscross pattern along the seam. 
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            Continue stitching until the repair extends at least 1/2 inch (~13 mm) beyond the damaged area. 
 
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            To complete the stitch, move the needle to the backside and make a secure knot on the backside of the fabric using one of the techniques from Knot Thread to the Fabric (2 Ways). 
 
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            Ensure the stitches have effectively secured the seam. 
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            For additional strength and coverage, repeat these steps to add another stitch line. 
 
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            Check the tension frequently while stitching, especially when repairing a slit or split seam, where fabric edges may shift. 
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            Adjust as needed by gently pulling or loosening the thread to ensure the stitches lie flat without distorting the fabric. 
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            Pause periodically to smooth the fabric and confirm the stitch tension is even along the repair. 
 
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