Why is the *K1, S1* a popular sock heel?

I have noticed that heel flaps constructed with K1, S1 repeat seam to be rather common. I know it looks nice and different (especially with multicolor yarn) but is there an attribute that lends itself to the heel flap? Does it pull a bit tighter, with the slips and all, or is it a bit more durable in the shoe because of the added thickness? Just curious.
ThanX for your input.

Maybe because it seems thicker and more cushiony than the rest of the sock.

The heel gets a lot of wear, so it is made thicker. Makes it more durable, like you said. :slight_smile:

Cool Cool
ThanX fro the prompt replies.

3 reasons:

1 the slip stitch pattern changes the gauge of the knitting, (row gauge) -it packs more rows into the same place

2–because the knitting is denser (see #1) its is stronger
–and because of the slipped stitches, the rows don’t line up either… so a single break is less likely to spread (it might run, but it won’t run and expand right to left (because the stitches either side were knit in a different row!)

3–and when that single thread breaks, there is a 50% chance there is a thread behind it… to still provide cushioning.

these 2 factors, denser (and thicker) fabric, that reisists becoming a hole if the yarn wears through and breaks, and that provides cushioning in the case of a break… make a slip stitch pattern a good choice for any place where there is hard wear!

Thank You, Thank You!
:slight_smile: :slight_smile: