A basic in-the-round, top down construction, one row is k2tog, YO repeat to end, and the second row is just k across.

Once it was long enough: k2tog 1 row, k 1 row 3 times, to taper the bottom.

Two 4 stitch i cords, woven into the top and bottom about 3 inches in, then slipped in my strap for transportation.

Ridiculously simple.