Sock Reinforcing or Darning Yarn — A Twisted Picot

Perfect to add a bit more strength to the heels and toes on socks or to repair holes now worn out. From Raggia This product is

What is the hardest wearing yarn for knitting socks? - Quora

Lang Jawoll Reinforcement Thread, 86.0069

Sock Reinforcing or Darning Yarn — A Twisted Picot

Lang Jawoll Reinforcement Bobbins Navy

Making and Fixing Socks

Making and Fixing Socks

Static Yarn Love: Self-Patterning Sock Yarn Projects - The Knit

Use Regia Sock Darning and Reinforcer yarn to strengthen parts of your socks which are prone to extra wear such as heels or toes. It can also be used

Regia Sock Darning and Reinforcer Yarn

Darn—there's a hole in my knitting!

Yarn — Shop Products — A Twisted Picot

Twisted – The Perfect Stitch Fibre Co.

Sock Reinforcing or Darning Yarn — A Twisted Picot

What is the hardest wearing yarn for knitting socks? - Quora