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Do Packing Cubes Actually Save Space?
What cubes really do, the benefit nobody markets, how to divide things up, what to look for in a set, three common mistakes, and what to use instead.
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Packing cubes are the most recommended travel accessory of the last decade, and the claims made for them range from sensible to nonsense. Here is the honest version: cubes do not create space out of nothing, compression cubes genuinely do reduce the volume of some things, and the biggest benefit is not space at all. It is that you can find things.
What cubes actually do
Three separate effects, worth separating because people mix them up.
- They make packing rectangular. A suitcase is a box, and clothing packed loose leaves curved gaps at the corners. Cubes turn soft clothing into stackable blocks that fill a box efficiently. This is a real, if modest, space gain.
- They stop migration. An unsecured bag settles and shifts in transit, which is what turns neat packing into a heap and creates creases. Cubes hold everything in place.
- Compression versions remove air. A second zip that squeezes the cube flatter genuinely reduces the volume of bulky, air-filled items — jumpers, fleeces, puffer layers. On t-shirts and jeans the gain is small, because there is not much air in them to start with.
What cubes do not do is make your clothes smaller. If the gain you were hoping for is thirty percent on a bag of dense cotton, you will be disappointed.
The benefit nobody markets
The thing that actually changes how a trip feels is retrieval. Without cubes, finding a specific t-shirt on day four means unpacking half the bag and repacking it badly. With cubes, you pull out one cube, take what you need and put it back, and the bag stays packed the whole trip.
That matters most on multi-stop trips where you never fully unpack, and in shared accommodation where there is nowhere to spread out. It also makes going through a security check far less painful, because the bag can be opened and closed without everything falling out.
How to divide things up
Two schemes work. Pick one and stick to it, because the benefit comes from knowing where things are without thinking.
| Scheme | How it works | Best for |
|---|---|---|
| By category | One cube for tops, one for bottoms, one for underwear and socks, one for laundry | Single-destination trips; easiest to maintain |
| By day or outfit | Each cube holds one complete outfit | Multi-stop trips, weddings and events, packing for children |
Either way, dedicate one cube to worn clothing. Keeping dirty laundry separate is half the reason a bag stays pleasant to open on day six.
Choosing a set
- Mixed sizes beat matched ones. Two large, two medium and a couple of small is more useful than five identical cubes.
- Mesh panels let you see the contents and let damp clothing breathe. Fully solid cubes hold smells.
- Two-way zips make opening a full cube far easier; a single pull on a packed cube is a constant irritation.
- Compression only where it helps. Compression cubes are heavier and bulkier empty, so use them for knitwear and outerwear rather than for everything.
- A separate laundry bag, ideally waterproof-lined, rather than using a clean cube for dirty clothes.
An eight-piece cube set gives you the mix of sizes plus a laundry bag for a longer trip; a four- or six-piece set is the sensible size for weekends and for a cabin bag.
Three mistakes
- Over-compressing. A cube crushed to maximum comes out as a solid brick of creases. Compress to firm, not to rigid.
- Cubing everything. Shoes, toiletries and electronics do not belong in fabric cubes — they want their own bags for different reasons.
- Buying too many. Every cube has weight and a little bulk of its own. Four to six is plenty; a set of ten mostly means carrying empty cubes home.
What to use instead of cubes, and alongside them
Cubes are one tool. A few things belong in something else entirely, and mixing them up is how a suitcase ends up smelling of shoes.
- Shoes: a dedicated shoe bag, or a plastic bag in a pinch. Soles go against each other, and the pair lives at the bottom of the case near the wheels.
- Liquids: a clear zip bag that comes out at security in one movement, kept at the top of the case or in an outer pocket.
- Cables and chargers: a small pouch with a bit of structure, so leads do not tangle through everything else.
- Dirty laundry: a lined or waterproof bag, not a clean cube. Most good cube sets include one.
- Jewellery and small valuables: a hard case in the bag that stays with you, never in the hold.
There is also a free alternative worth mentioning honestly: large zip-lock bags do most of what a plain cube does, cost almost nothing and let you press air out by hand. They are less pleasant to use, tear eventually, and look scruffy — but if you are testing whether the cube idea suits you before buying a set, a few zip-locks will answer the question for the price of a sandwich.
Where proper cubes earn the difference is durability, mesh panels that let clothing breathe, sizes that match a case rather than a lunchbox, and zips that survive being pulled hard on day six of a trip.
Using cubes in a small bag
Cubes are usually associated with big suitcases, but they earn their keep most in the smallest bags, where every gap counts and where digging around is hardest. Two small cubes in an underseat bag — one for clothing, one for cables and chargers — turn a cluttered tote into something you can actually use at a seat with the tray table down.
If you travel with a personal item only, the combination of a softside underseat tote and two small cubes is a surprisingly capable overnight setup.
Frequently asked questions
Do packing cubes actually save space?
Modestly, by making soft clothing stack squarely in a rectangular bag. Compression cubes save more, mainly on bulky items with air in them. The bigger benefit is organisation.
Compression or regular?
Compression for jumpers, fleeces and jackets; regular for shirts, trousers and anything you want uncreased. A mixed set is the practical answer.
How many cubes do I need?
Four to six for most trips, in mixed sizes, plus a laundry bag. More than that and you are carrying empty fabric.
Do cubes stop creasing?
They reduce it, by stopping clothes shifting in transit. Over-compressing has the opposite effect.
Can I put shoes in a packing cube?
Better not — use a dedicated shoe bag. Fabric cubes are not designed to keep dirt off the rest of your clothing.
Do they work in a backpack?
Yes, particularly in a clamshell-opening pack. In a top-loading pack use softer, smaller cubes so they conform to the shape.
How do I wash them?
Cold machine wash, air dry. Most are nylon or polyester and survive it easily; check that the zips are closed first.
Are they worth it for a weekend?
For a single-destination weekend, marginal. For anything with multiple stops or a small bag, yes — that is where finding things without unpacking pays off.