Paper-bag waistbands are, actually, a contradiction — both refreshingly loose and using extra fabric. Imagine, if you will, a paper bag full of sweets twisted shut. Now turn this into fabric and instead of the twist, add a belt. Paper-bag waistlines can be both high and feminine or low slung, echoing the spirit of Katherine Hepburn. They get their name from the gathering technique and the fabric over the belt hooks.