Goodyear welt construction is very labor-intensive. The method is an old one, but it’s still used today because it creates durable footwear. A rib is created across the insole, the outsole is stretched over the last (along with the insole), then a shoe-specific thread is used to stitch the welt, upper, and insole rib. A separate stitch is used to attach the outsole to the welt. A lockstitch is used for both of these stitches – this means the chain won’t unravel if it breaks at any point on the shoe. This type of construction makes it easier to replace the soles if needed.
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