Perfect for souvenirs and gifts, the Pack-Flat Duffel Bag folds flat to fit neatly into the bottom of your suitcase. Open it up and it becomes a roomy, lightweight 21″ duffel. You won’t have to wish you had an extra bag for those once-in-a-lifetime purchases. Polyester. Measures 21� W x 12� H x 11� D when open