Just checking a pattern instruction

[Lisa R.]

The instruction for a heel flap of a sock reads:

Row 1 (RS): Sl 1 wyif, *K1,sl 1 wyib, rep from * to last st, K1

So I'm slipping one with yarn in front (meaning purlwise, I presume), then alternate knitting one and slipping one with yarn in back (knitwise or purlwise??)

This is a little different than the Sl1, K1 that I've done on other sock heels, and I thought I'd check before getting in the middle of it and finding holes in my heel!

Thanks!

[Knit4Pie]

You may want confirmation because this is such a tricky subject, but you will slip them both purlwise, just change where you hold the yarn.

[suzeeq]

Yes, wyif is to hold the yarn as if to purl, with yarn in back is holding the yarn as if to knit, however you slip both sts purlwise.