For reasons unknown to me, Gap added a side zipper to a skirt that already has pull-on type back-of-waistband elastic; because of the thickness of the elastic waistband where it is sewn to the zipper, the zipper can't fully close (or requires more force than I am willing to apply to delicate cotton) and gapes open at the waistband. The fabric is beautiful but I don't know what they were thinking with the waist design (and the blue eyelet skirt I also ordered from this season has the same issue). Just pick one closure- pull on or zip up!