What Is a Duffle Bag? | Soft-Sided Travel Explained

Whether you call it a duffel or a duffle, this roomy soft-sided bag is one of the most practical ways to carry clothes and gear for a weekend trip, a gym session, or a camping outing. The defining feature isn’t the shape or the closure—it’s the flexible fabric construction that lets the bag squeeze into tight spaces when empty and expand to swallow an surprising amount of gear when full.

Duffel vs. Duffle: Which Spelling Is Correct?

Both spellings are correct. Merriam-Webster and Cambridge Dictionary list “duffel bag” as the primary entry, but major dictionaries treat “duffle” as an accepted variant of the same term. You’re not choosing between two different products—just two ways to spell the same thing.

The word traces back to Duffel, a town in Belgium where the thick woolen cloth used for early bags was originally made. Over time, the spelling drifted, and both forms stuck in everyday American English.

What Makes a Bag a Duffle Bag?

Most people picture a cylindrical canvas sack with a drawstring top, but the definition is broader than that. Dictionaries describe a duffle bag as soft-sided, oblong or cylindrical, and made from canvas, nylon, or another strong fabric. The common thread is flexibility—a duffle has no rigid frame or hard shell.

Key features you’ll typically find:

• One main compartment—no complex interior organization, just open space for bulky items
• A top closure—zipper or drawstring, depending on the design
• Carrying options—handles, a shoulder strap, or both
• Collapsible construction—folds flat when not in use, unlike a hard-shell suitcase

Duffel Bags vs. Suitcases: Which Should You Choose?

The right choice depends on how you travel. A duffle’s soft sides let you stuff it into overhead bins, car trunks, and tight locker spaces. A suitcase’s hard shell protects fragile items but takes up fixed space whether full or empty.

For camping, the duffle usually wins. It handles dirty gear, folds into the trunk, and shrugs off the bumps of a gravel road. Merriam-Webster’s definition notes the bag is “carried by hand or over the shoulder,” which suits hauling gear from the car to the campsite. If you’re planning a camping trip and want to compare options built for the outdoors, our tested roundup of duffle bags for camping breaks down the best picks by size, durability, and price.

What Can You Carry in a Duffel Bag?

That depends entirely on the bag’s size, since dictionaries don’t set a universal capacity standard. Small gym duffles hold a change of clothes and a pair of shoes. Medium travel duffles—typically 40 to 60 liters—carry enough for a long weekend. Large expedition duffles swallow camping tents, sleeping bags, and cooking gear.

The bag’s soft sides give it one advantage suitcases can’t match: compression. You can roll clothes tight, stack gear in layers, and stuff the last item into the top without fighting a rigid frame. Oxford Learner’s Dictionaries describes it simply as a “large bag” for carrying clothes and belongings during travel, which leaves room for everything from a week’s wardrobe to a trunk full of fishing equipment.