A duffel bag, also known as a gym bag, is a cylindrical bag carried over the shoulder, made from canvas or similarly rugged materials. It can be closed with a drawstring or zipper. Older military-style designs historically had a single closure on one end; modern variants tend to have zippers along the length of the top and may have multiple compartments for easy storage.
Due to their large size and durability, duffel bags are typically used for hauling sporting equipment and/or uniforms. Travelers may carry them as an alternative to suitcases.