With 1 strand each of A and B held together, make a slip knot. Holding the strands across top of flip flop strap, insert hook under strap and yarn over, creating 2 loops on hook, yarn over again and pull strands through both loops - single crochet around strap made.
Continue working until strap is covered.
Join 1 strand each of A and C held together with slip stitch in first single crochet of Wrap.
Row 1: *Chain 3, slip stitch in next stitch; repeat from * across Wrap. Fasten off. Weave in ends.