Here I was so pleased the other week to have sorted out the slip stitch heel. Lo and behold, it seems I became carried away. To the right is the recognizable green slip stitch heel. To the left is the "thought I'd figured it out and then went too far" triple thick Slip Stitch? You Betcha! Yes, the airport socks included both the slip 1 knit 1 rows and some extra, we're not messing around slip 1 purl 1 rows.
I won't be needing to mend those heels. Nice actually, what with the yarn being such a treat.