Compression packing cubes and compression bags are the most transformative packing upgrade most travellers ever make. If you've never used them, this guide explains exactly how they work, which type is right for your trip, and the technique that gets the most out of them.
Compression Bags vs Standard Packing Cubes: What's the Difference?
Standard Packing Cubes
Standard packing cubes organise your clothing into separate compartments — one for t-shirts, one for pants, one for underwear — so your bag stays tidy and you can find everything without unpacking. They don't significantly reduce the volume of your clothing. They're great for organisation but don't help with space.
Compression Bags (What Trip Topp Sells)
PackEase™ Compression Bags do both: they organise AND compress. A double zipper system seals the bag, and a second compression zipper pushes the remaining air out, compressing the contents by up to 50%. The result is a cube that holds twice as much clothing as a standard packing cube of the same size.
How Much Space Do They Actually Save?
Here's a real-world example for a 7-day trip:
- Without compression: 7 t-shirts, 4 underwear, 2 pairs of shorts, 1 jumper = roughly half a carry-on bag
- With compression: Same items = roughly one-quarter of a carry-on bag
That freed-up space goes to shoes, toiletries, tech gear, or simply means you don't need to check a bag at all.
Which Size Do You Need?
PackEase™ Compression Bags come in small, medium and large. Here's how to use each:
- Small: Underwear, socks, swimwear, gym clothes. Roll items tightly before placing in the bag for maximum compression.
- Medium: T-shirts, shirts, light tops. Lay flat, fold once, stack, then compress.
- Large: Jeans, jumpers, thermals, heavier items. Most people use one large bag for their bulkiest items and medium/small bags for lighter clothing.
A typical carry-on-only packer uses: 1 large + 1 medium + 1 small = everything they need for 7–10 days.
The Right Technique: How to Pack Compression Bags
- Roll, don't fold. Rolled clothing compresses more efficiently and wrinkles less than folded clothing.
- Pack tightly. The more densely you pack the bag before compressing, the more effective the compression. Loose items leave air pockets.
- Heaviest items at the bottom. Jeans and thermals at the bottom, lighter t-shirts and singlets on top.
- Seal the main zip first. Make sure it's fully closed before engaging the compression zip.
- Run the compression zip around the edge. The compression zip removes the remaining air as it goes — go slowly and let the bag deflate as you move around the perimeter.
- Stack flat in your bag. Compressed bags stack flat like panels in a suitcase, making them easy to layer.
When Compression Bags Make the Biggest Difference
- Winter travel: Jumpers, thermals and jackets compress dramatically. This is where compression bags save the most space.
- Carry-on only travel: The difference between needing to check a bag and flying carry-on only is often just two or three jumpers. Compression solves this.
- Families: Packing for 4 people into 2 suitcases is a puzzle. Compression makes it achievable.
- Long trips: A 3-week trip worth of clothing can often fit in 1 suitcase with compression rather than 2.
What Compression Bags Don't Work Well For
- Formal wear: Suits and formal dresses that can't be wrinkled should go in a garment bag, not compressed.
- Down jackets: Compressing down too tightly for extended periods can damage the down clusters. Use compression briefly for packing, but store your down jacket loosely when possible.
- Fragile items: Don't put anything that could be damaged by compression in these bags.
The Vacuum Backpack: Next Level Compression
For travellers who want maximum compression in a carry-on, the Travel Vacuum Backpack takes this further — a built-in hand pump removes air directly from the bag's storage compartment, compressing contents by up to 40% beyond what manual compression achieves. Ideal for 10–14 day trips where carry-on-only seems impossible.
Frequently Asked Questions
Will compression bags wrinkle my clothes?
Rolling rather than folding minimises wrinkles. Lightweight fabrics (cotton t-shirts, activewear) compress without significant wrinkling. Heavier fabrics like linen and silk should be compressed lightly or avoided. Shake garments out immediately on arrival and most wrinkles fall out within an hour.
Can I use compression bags in carry-on luggage?
Yes. They're not pressurised containers and aren't subject to airline liquid rules. Many frequent flyers use them exclusively in carry-ons.
Do I need to remove air again after customs opens my bag?
If customs opens your bag and repacks it (which can happen), the compression zip can be re-engaged in about 30 seconds. This is one advantage of compression bags over vacuum bags that require a pump.