I tried so many different patterns with this yarn and ended up just going back to basics. Everything else was too busy for my tastes - I think because of the varying width of the stripes, it just got too muddled.

Ah well, never can have too many basics, right?

Toe: CO 24, inc to 64.
Heel: pick up 2 sts each side, 68 sts. K 1 row, then begin dec - every other row until 32 sts remain.
Leg: inc at first row of third grey stripes, 72 sts.