How to Master One-Bag Travel: 8 Items to Pack and 8 to Leave Behind

I’m a frequent traveller, and I have no room in my life or my backpack for single-use clutter or ‘just-in-case’ panic packing. For me, streamlining the things I travel with isn’t just about weight; it’s about freedom and ease of movement.

If you scroll through r/onebag, you’ll see a lot of 40L to 45L carry-on setups pushing the absolute limits of transatlantic overhead bins. That’s fine for some, but it’s not for me. My baseline is strict budget-airline limits: a single under-seat bag that fits within the 40x30x20cm Ryanair size limit. And if it fits in that, you’re good almost anywhere. Many of my trips don’t involve flying, but I still stick to those boundaries. Every single item I bring earns its spot in that footprint with no cheating!

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Cabin Zero Ultralight Compression Packing Cube (Large) | Cabin Zero matching medium Packing Cube | Cabin Zero Military 28L backpack | Finisterre Firecrest Technical Jacket, Cabin Zero 6L Moonbag | Ugreen 65W Wall Charger with International Ends | Nanobags | Laundry Sheets | Cloudstepper Shoes

My 8 Items That Make Packing Light Easy to Stick To

Here are 8 essentials that make my one-bag travel style easy to stick to. Occasionally, there might be a reason I won’t bring one or two of them, but these are my defaults, and I know that if I pack them, I’ll have a framework for everything else.

I’ve also added 8 things I find unnecessary and can happily do without. If you can’t live without them, that’s fine. We are all different. No judgement.

1. Under 30L Backpack

Limiting your main bag to under 30L sets a strict physical ceiling. A simple layout with minimal built-in organisation beats a complex, heavy bag. It keeps the weight down and leaves room to drop in modular packing cubes and pre-packed pouches with wiggle room.

When choosing a bag, pick a durable one with strong zips and a wide opening, so you can pack and find things easily. Make sure your bag is built for comfort, not for a long, and most likely contradictory, tick list. Pick a colour like black, grey or navy and avoid shouty logos if you don’t want to stand out, or a bright colour if you do.

➡️My Pick: CabinZero Military 28L Backpack

Here’s my dedicated review: Is the Cabin Zero Military 28L the Best Personal Item Backpack for European Budget Airlines?

2. 5L Crossbody Sling

A medium sling keeps essentials close at hand while exploring without a backpack. When moving between destinations, it slides right into the top of the main pack. 5L is the sweet spot: room for a water bottle and valuables without fumbling and playing Tetris to zip it up.

On the outside, my bag looks similar to the viral Uniqlo crescent bag. But delve deeper, and it’s a definite upgrade. Fully weather-resistant, a light colour lining to make it easier to see everything inside, an anti-theft toggle to secure the zip, internal pockets and two external pockets, one with RFID. Wear it how you like. Either tight to your body, as a sling or to one side. It’s not loud or original, but that’s the point; it will take you anywhere. Mine is black; other colours are available.

➡️My Pick: CabinZero 5L Moon Bag

3. Ultralight Packing Cubes

Cubes act as a mobile wardrobe, keeping clothes organised and compressed. Choosing cubes designed to match your bag’s internal dimensions eliminates dead space. Look for ripstop nylon, strong three-sided zips, and optional compression and learn to roll your clothes in a way Marie Kondo would be proud of. I use a large compression cube for my tops, bottoms and any dresses and a medium one for underwear, sleepwear, and accessories

➡️My pick: CabinZero Ultralight Compression Cubes (Large & Medium)

4. Packable Bags

Instead of carrying a day bag, which can end up feeling too big or too small, depending on the day, build in flexibility. Carry a wafer-thin, packable option to adapt on the fly. The bags I use weigh under 30g each, can disappear into your pocket, yet won’t rip, dissolve over time, or cut into you when you fill them. I usually travel with 3!

Yes, you can get cheaper versions at Decathlon. I’ve used those for years too, and I rate them. But this is next-level packability, and they look great too.

• 19L Packable Sling: Extra capacity for days when 5L isn’t enough, leaving room for the layers you might need to add or remove. Plenty of space for a picnic, shopping, a day at the beach or anything else.
• 16L Packable Daypack: A neat little daypack for day hikes when you need it, but a shoe bag for your dirty shoes when you don’t.
• Packable Tote: I use mine to separate and transport dirty clothes. And of course, for anything else, I think of.

➡️My pick: Nanobags

5. Multi-Weather Tech Jacket

For all but the coldest or wettest weather, a single high-performance jacket replaces bulky hoodies, fashion jackets, fleeces, sweaters and rain shells.

Warmer than a rain shell and more wind- and rain-resistant than others on that list, this synthetic insulated light jacket is a great default option when the weather is ‘meh’ but not terrible. For more extreme conditions, add warmer layers underneath or a rain shell on top. I carry an ultralight umbrella with me too, one so compact it lives in my 5L crossbody sling, so it’s always there when I need it.

Light and highly packable, it earns its place even on warm-weather holidays, because being cold is a ‘just in case’ scenario worth planning for. It also comes in options with or without a hood and in a sleeveless version. With a matte finish in black or muted colourways, it’s low-profile enough for the city without looking too ‘outdoorsy’.

➡️ My pick: Finisterre Firecrest Hooded Jacket (available in both men’s and women’s sizes)

6. Ultra-Supportive, Comfortable, Packable Shoes

Shoes are usually the hardest item to optimise, and if you are bringing more than one pair, extra pairs need to be packable.

I couldn’t believe how light these were (330g per pair, Women’s UK Size 6.5 / EU 40). They are supremely comfortable, have a rigid midsole, arch support, a wide toe box, and good grip. They’re versatile too. Suitable for the gym and for the water, and their low-key look means they’ll pass if you’re going somewhere fancier. The uppers flatten when you pack them, taking up the same space in your bag as a pair of flip-flops or compact sandals. They come in white, black and a few other colours too.

Pack these and bring another pair to wear on your feet. Sandals, boots, or dress shoes, your choice. Perfect, if you don’t want to live in trail runners and want options!

• ➡️My pick from Clarks (UK): Cloudstepper Solevana Tie (women’s), Cloudstepper Solevana Easy (men’s)
• ➡️My pick from Amazon.com: Cloudstepper Solevana Tie (women’s), Cloudstepper Solevana Easy (men’s)

7. Multi-Port Wall Plug with Swappable Ends

Ditch single-purpose chargers and bulky travel adapters. A single 65W plug with interchangeable global snap-on heads powers a laptop, phone, and power bank simultaneously via USB-C cables, and if it comes with USA/UK/Euro plug ends, it will work in over 150 countries. If that’s not enough countries, pick up an extra adapter locally.

If you’re still travelling with your proprietary laptop cable, wobbly adapters, or slow, underpowered wall chargers, switching will make a big difference.

➡️My pick: UGREEN 65W Charger (International Version)

8. Concentrated Laundry Sheets

“Pack for a week, wash and repeat” is the way to go if you want to travel indefinitely with one small bag. With a few strategic layers and accessories, it’s perfectly possible to cope with changing weather on an extended trip.

Liquid-free laundry sheets weigh virtually nothing, bypass airport liquid restrictions, and work equally well in a laundromat machine or a hotel sink.

You can upgrade your travel laundry system by adding a small Scrubba bag and a portable clothesline, but if I’m washing just for me, I’ve not found them essential.

➡️My pick: Dr Beckmann Laundry Sheet

And 8 Things I Don’t Bring

1. Full-Sized Hair Tools

I’d love big waves, but my hair is straight. Embracing my natural texture, maintaining its condition when I’m away with a quality shampoo and a dry oil and keeping it trimmed regularly in a low-maintenance style saves a lot of bag space. It eliminates the worry around voltage converters entirely.

2. Bulky Travel Adapters

Travel Tech is dense and heavy, and it’s easy to add ‘just one more thing’. Heavy, blocky all-in-one adapters can easily fall out of wall sockets and usually offer only 4 plug options. If you can charge everything via USB-C, a single compact 65W plug with modular snap-on heads does the work of separate chargers and an international adapter.

3. “Needy Gadgets”

If a device requires its own proprietary cable and daily charging, it doesn’t make the cut. Gear should work for you, not give you a chore list on holiday. Smartwatches can fall in this category, but it’s good to know they are not all the same. I have a Withings ScanWatch 2, with plenty of smart features and a beautiful analogue display. It lasts 30-35 days between charges.

4. Decanted Liquids & Lotions

Decanting creams into tiny plastic pots is time-consuming, messy, prone to leaks, and easy to forget to label. I don’t like the cost or the single-use plastic element of travel minis, both in my pocket and to the environment. I opt for solid multi-use bars, dry oil and tins. I aim for zero-waste products when I can and opt for compact options that easily meet liquid allowances and last at least a month.

Here’s what I do instead: Lightweight Travel Toiletries for One-Bag Travel: My Complete Kit

5. A Third Pair of Shoes

Shoes take up more volume than almost anything else in a pack. Your favourite pair on your feet and one ultra-lightweight pair in the bag are all you need for most itineraries, formal, casual, or active. Just choose carefully.

6. Bulky Tech and Toiletry Organisers

Dedicated organisers are often heavy, bulky, and obsolete the moment your gear changes. Soft pouches or bag pockets adapt to your tech far better than rigid cases. A simple pouch for your toiletries is sufficient, provided you don’t have too many items to put in it.

7. Dedicated Travel Liquids (Shampoo, Wash, Detergent).

Carrying separate bottles for body wash, shampoo, and laundry detergent adds needless weight. A solid shampoo, a face-and-body cleanser, and concentrated laundry sheets handle daily hygiene and sink washing in one go, or if you’re going away for a while, you can buy on arrival.

8. “Just-In-Case” Packing & Imaginary Outfits

Packing for unlikely “what-ifs” or an idealised holiday wardrobe leads to overpacking. Stick to your actual daily comfort zone. If a problem arises, a quick trip to a local shop or a bit of lateral thinking will solve it. Don’t let perfect be the enemy of the good.

More Tips on Packing Light

Minimalist packing isn’t about suffering through a trip with the bare minimum. It’s about removing the friction so you can focus on where you are and what you’re doing. By removing the excess, swapping for adaptable essentials, and quieting the ‘what-if’ scenarios, you free up space, time, and peace of mind.

If you’re looking to lighten your load, look at each category separately, from the bag you choose to the types of stuff you put in it. Look at what you have already, and keep any purchases strategic and intentional.

Here are some more suggestions in each area:

• Lightweight Travel Toiletries for One-Bag Travel: My Complete Kit
• Lightweight Travel Tech for One-Bag Travel: My Complete Kit
• 18 Best Tiny Travel Essentials – Minimalist Packing for One-Bag Travel
• How to Pack a Travel Capsule Wardrobe in One Underseat Bag
• Is the Cabin Zero Military 28L the Best Personal Item Backpack for European Budget Airlines?

What’s the one item holding your packing list back? Let me know in the comments.