Socks (store-bought or handmade) that have holes or frayed areas can be mended using the stocking darning technique. Here's how.
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the process darning & patching the (well-loved) socks I knit for my mom a few years ago!! she was surprised to be re-gifted them today 😊 : r/knitting
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I don't have the patience for darning, so I'm fixing my holey wool socks with felting instead. : r/Visiblemending
How to Darn a Sock