work the first of the 2 rows again

[PrEtZ]

sorry, one more question..... how to slip stitch cast-off edge..? all the sts had already cast off....

[suzeeq]

It may mean to do a crochet slip st along the edge. See if there's a crochet hook mentioned in the materials list.

[PrEtZ]

no, it didnt mention. In the book, it just says, Fold front strap over ankle strap and slip stitch cast-off edge in place.

[suzeeq]

Okay, you can just sew the edges together, or slip st with a crochet hook. That's kind of like picking up a st but also binding it off as you go instead of leaving the st on the R needle, if you want to try that.