Unfold the hank of A yarn.
This yarn is constructed like a tube. Gently open up the length, slide your hand through the tube and grasp the opposite end of yarn. Pull this end through to make a doubled thickness.
Waistband and Ties
Wind 2 colors of B yarns into 2 separate balls each. With 4 strands of B yarns (2 strands each of 2 different colors) held together and leaving long beginning yarn tails, join B strands with a slip stitch along one long side of doubled A length. Single crochet into A, then work next single crochet about 1 in. (2.5 cm) further along the long side of A. Continue in this way across the edge of A, so that the edge of A gathers as you work across to desired waistband length. Turn, ch 1, then single crochet into each stitch across. Fasten off, leaving long yarn tails.
Trim ends of yarn tails.