In short: both are "air-filled packaging", but they protect different things. A dunnage bag fills the void between pallets, crates or container walls and braces the whole load so it cannot shift. An air pillow cushions individual items inside a carton, absorbing shocks for one product at a time. One braces loads, the other cushions products — swapping them is the most common mistake, and it is how loads end up leaning or crushed.
The confusion is understandable: both arrive flat, both inflate with air, and both have "air" in the sales pitch. But the moment you ask "what force is this holding back?", the two products part ways completely. A dunnage bag holds back tonnes of shifting cargo; an air pillow holds back the bump of a parcel in a courier van.
The job: bracing a load vs cushioning a product
A dunnage bag sits in the gap between two pallets, or between a pallet and the container wall. Inflated, it becomes a firm, pressure-rated block that locks the load in place: when the truck brakes or the ship rolls, the bag takes the force and the pallets stay put. Tezheng's dunnage bags cover gaps of 10–50 cm in six standard sizes, inflated to no more than 0.3 bar, and the range has passed SGS chemical safety testing (TPCH) — note this is a chemical safety test, not railroad performance certification.
An air pillow does none of that. It is a small, thin film cushion tucked around a bottle, a cosmetic jar or an electronic accessory inside a carton, so the item does not rattle against the carton wall. Its film is light, its pressure is low, and it is designed to be popped or compressed by a single item — not to hold a pallet in place.
Why you cannot swap them
Stuffing air pillows into a container void is the dangerous swap: they burst or flatten under the weight and movement of a full load, leaving the pallets effectively unbraced. The load then does exactly what dunnage bags exist to prevent — it leans, slides and crushes cartons at the bottom of the stack. The reverse swap is wasteful rather than dangerous: a dunnage bag is far too large and stiff to wrap a single product inside a carton, and its cost per unit makes no sense for inner packaging. For single items inside a carton, use air pillows, foam, or — for bottles and jars — honeycomb paper sleeves.
How to choose: ask where the air goes
The selection test is one question: is the air going between loads or around a product? Between loads — container, truck or warehouse gaps — choose a dunnage bag: measure the void width, pick the size for that range, and if the gap falls between two sizes, go up one size rather than over-inflating a small bag. See how to use a dunnage bag in a container for the step-by-step method. Around a product inside a carton, choose air pillows or another inner cushion, sized so the item cannot move inside the carton but is not squeezed. If you are not sure which gap you are filling, measure first: a void of 10 cm or more between pallets is dunnage-bag territory; a rattle inside a carton is air-pillow territory.
Disposal and reuse, briefly
At the end of the journey the two products part ways again. A dunnage bag should be fully deflated first, then checked: undamaged bags can often be reused, damaged ones sorted by material for recycling — see how to dispose of used dunnage bags. Air pillows are generally single-use inner packaging: deflate, sort with other plastic film where local recycling accepts it, and never puncture an inflated bag of either type.
What's the difference between dunnage bags and air pillows?
Dunnage bags brace whole loads in container voids; air pillows cushion individual items inside cartons. Different jobs, sizes, pressures and materials.
Can air pillows replace dunnage bags in a container?
No — they burst or flatten under load weight, leaving pallets unbraced and free to shift.
Can dunnage bags replace air pillows in a carton?
Not practically — they are too large, too stiff and too costly for inner carton cushioning.
What sizes and pressures do dunnage bags come in?
Tezheng's range covers 10–50 cm gaps in six standard sizes, inflated to no more than 0.3 bar.
What is the MOQ and lead time?
Tezheng's export MOQ is 5,000 pieces for dunnage bags, with a lead time of about 20 days from production to port. Order samples first and trial them in a real gap.
Related reading: how to use a dunnage bag in a container and how to dispose of used dunnage bags.