Essentially, this is the Simple Skyp Sock, without the skyp stitch.

CO 72
15 rows of K2 P2
1 row of P
70 rows of K6 P2
1 partial row of K6 P2 (stop 3 sts before end of round, call this new beginning of round)
36 row heel flap (18 slipped sts), end on a K row
Short row heel shaping as described in Simple Skyp Socks pattern
Pick up 20 sts for gusset
Decrease for gusset to 72 sts, alternating decrease and knit even in the gusset, stay in pattern in the instep. Start with decrease row
60 rows of instep in pattern (ribbing on top, stockinette on bottom)