Top-down. Written for circular needles, but easily adapted to DPNs or magic loop. Written for a cast-on of 72 stitches, but easily changed by adding on an extra stitch or 2 (or taking away) from the edges of the charts. Gusset increases for the heel are centered on the back.

Spring in upstate New York.. one day it’s hot, one day it’s cold. Overnight it’s in the 30s, by lunch time it’s 60!