Gym bags are rectangular bags with handles and typically a shoulder strap. Gym bags are often made of nylon or leather and are typically used to carry needed items to a gym for a workout. Gym bags may also be referred to as duffels.
About Luggage:
Luggage is any number of bags, cases and containers which hold a traveller's articles during transit. Types of luggage include suitcases, duffel bags, and tote bags. Today many types of luggage have wheels as an added convenience.