Carry your luggage in style with a duffel bag: the must-have accessory for toting around your belongings. Use a full-sized version as a gym bag or as a lighter alternative to a suitcase. Herschel Supply Co. design retro pieces in basic block colors, that are ideal for a weekend away, while L.a.m.b is your go-to for heavy-duty travel bags. Small and compact duffels on the other hand make for the ideal handbag. Look to Diane von Furstenberg for timeless versions or Karen Walker for a mini alternative.