After seeing such widespread interest in more durable, longer lasting sock heels, I've written up a how-to for double-knitting sock heels. I've knit several pairs of socks with double-knit heels. You may be familiar with the first ones:
I first wrote about these in November of 2011. I wasn't totally happy with the result at that time. Since then, I have improved the design, producing a second pair with better-fitting heels.
I wrote about these in the Summer of 2012. These were much better heels. Still, I've improved the design even more since then. The pattern includes two different methods of knitting double-thick heels: a simple one for those that don't want to fuss with two strands of yarn and a standard two-strand approach that offers the opportunity to add a design to the heel flap. I've improved the leaf and added two more designs. I'll be writing about those soon. But don't wait, purchase my pattern and knit your own!
Double Heel Socks, only $1.99 --