Simplicity 7531; ©1986; Boys' and Girls' Easy-To-Sew Jams in Three Lengths: Jams with side seam pockets have elastic and inside or outside cording drawstring through waistline casings. Long length V. 1 and Bermuda length V. 2 short length V. 3 has back patch pockets (wrong side of fabric will show when legs are rolled up). V. 4 with front and back seaming is made in two contrasting fabrics.