Travelling with hand luggage isn’t always as simple as it should be. It would be great if it was always a case of packing your essentials, heading to the airport, and breezing through the gate, but the moment you need to deal with a bag sizer, a good mood can easily turn into stress, frustration and unexpected fees that eat into your hard-earned holiday budget.
At Cabin Max, we’ve spent years studying why so many cabin bags fail airline sizers to stop it happening to our customers. We’ve found that most bags don’t fail because they’re too big, it happens because they bulge.
Soft-shell bags expand outwards when they’re full and this can distort their shape so they’re pushed beyond airline limits. Even if a bag meets the size rules it can still fail if it bulges at the edges.
We designed our Paxos range to solve this problem.
The Real Reason Cabin Bags Fail Airline Sizers
A lot of travellers assume that if a bag is labelled 40x30x20 cm or 40x20x25cm then it will automatically fit airline rules. However, airlines don’t measure bags by their dimensions when they’re empty. They actually measure them by their shape at the gate once you’ve packed them.
Soft-shell bags can stretch, bulge and distort, and once this happens it means they don’t match the dimensions that you see on the label.
If a bag is labelled as 40x30x20cm, it can easily become bigger once you’ve packed it. A small bulge can mean paying over £50 extra when you fly with airlines like Ryanair and Wizz Air.
Travellers don’t overpack because they’re careless. Overpacking happens because people naturally want to make the most of their allowance. The problem is that you can get punished by the airlines when you do this, and this explains why we designed a range to help you avoid this.
ShapeSafe™: The Anti‑Bulge Technology That Changes Everything
Our Paxos range uses ShapeSafe, which is a rigid EVA external shell that prevents distortion. You can rest assured that your bag will stay perfectly square, flat and within airline’s rules no matter what you pack. This technology works by distributing internal pressure evenly across the structure. The contents of your bag will settle inward so the bag’s external dimensions will stay fixed and your belongings won’t push outwards.
These innovative products let you pack more without your bag changing its shape. They fit effortlessly into airline sizers even when they’re full so you never have to squeeze or force them. If you want a bag that will give you guaranteed compliance, we’ve got the right solution for you.
Exploring the Paxos Range
Here are some of our most popular Paxos models. We have something to suit all kinds of travellers, with each option built around the same pioneering anti-bulge tech.
Paxos 24L Backpack — 40×30×20 cm
The Paxos 24L Backpack is our most versatile ShapeSafe™ model and it's been specifically designed for the airlines with the strictest under‑seat rules. If you fly with airlines like Ryanair, Wizz Air, Vueling, Volotea or Transavia this backpack will give you maximum packing space without the risk of sizer failure.
Travellers love this product because it gives them a guaranteed 40x30x20 cm shape even when it’s full. It has a clamshell opening for suitcase‑style packing as well as a laptop compartment for devices up to 13". You also get a hidden rear pocket for passports and phones plus a water bottle holder that helps you stay hydrated with ease. You can carry it using the backpack straps, top handle or side handle. The 24L capacity means it’s one of the largest of its kind available. The bag also comes with a 3-year warranty to give you extra peace of mind.
The bag weighs just 990g so it’s very lightweight, but it’s also incredibly durable because of its tough EVA construction. The split clamshell layout will let you pack more efficiently than a traditional backpack and you can keep smaller items organised easily with the zipped pockets.
Paxos 20L Holdall — 40×20×25 cm
If you’re flying with an airline that uses the narrower 40x20x25 allowance, the Paxos 20L Holdall may well be the solution for you. This bag has a ShapeSafe shell that stays 40x20x25 cm and weighs just 680g, which means it’s ultra-lightweight. It’s got a 20L internal capacity with zipped pockets and packing ribbons as well as a shoulder strap and top handle that makes it ideal for anyone who needs a flexible carrying solution. The rear suitcase sleeve lets you pair the bag with rolling luggage. The bag is available in cream or black.
With this bag, you also get a 3-year warranty. The clamshell design lets you pack flat, organised and efficiently and the 20L interior is more spacious than you might think. If you need the lightest and most compact ShapeSafe option for short trips, commutes and budget flights where every centimetre counts, it’s a great idea to consider this popular holdall.
Paxos 24L Holdall — 40×30×20 cm
The Paxos 24L Holdall gives you the same generous 40x30x20cm capacity as the backpack version but in a sleek holdall format. This is a really popular bag with travellers who prefer a shoulder-carry style but don’t want to compromise on packing space.
The ShapeSafe shell stays 40x30x20 cm without bulging, and you get a 24L capacity with zipped pockets and packing ribbons. The slim front pocket is brilliant for holding phones and boarding passes, whilst the shoulder strap and top handle make carrying the bag a breeze. The bag comes in cream or grey and weighs just 680g. You also get a 3-year warranty. The clamshell layout will give you the same packing efficiency as you’d get with a small suitcase. On the outside the minimalist design makes sure everything stays clean, modern and practical.
If you’re looking for the maximum packing space in a holdall format and guaranteed compliance, this bag can serve you well for many years to come.
Why Paxos Is the Safest Choice for Modern Travellers
Airlines have been enforcing their cabin bag rules more strictly than ever recently with gate checks becoming more common and fees getting bigger and bigger. Even if a bag bulges by just a couple of centimetres it could cost you as much as £75 in penalties, and that’s just for one flight.
Airlines are enforcing cabin bag rules more strictly than ever. Gate checks are becoming more common, and fees are rising. A bag that bulges by even 1–2 cm can cost you £75 on a single flight.
This is why we designed our Paxos bags around the promise of perfect sizing every time. With ShapeSafe there’s no need to pack cautiously, worry about bulging or feel you’re taking a huge gamble when you get to the gate. Paxos bags let you pack, travel and enjoy your journey.
You just pack, travel, and enjoy the journey.
Cabin Max: Travel Smarter
The bags that we design at CabinMax are designed to solve real problems and take the stress out of travel. We listen closely to what travellers have to say, always keep ourselves up to date with the very latest airline rules and carefully produce products which make your flights easier, cheaper and more predictable.
Many years of development went into creating our Paxos range. Paxos bags give you a simple but elegant solution to one of the most frustrating challenges in modern travel, which is complying with airline rules to avoid fines and penalties.
If you’ve been looking for a cabin bag which fits airline sizers each time, lets you pack more than you might expect, always stays perfectly shaped so you don’t have to worry about bulging plus looks great and lasts for years, the Paxos range of bags can give you everything that you need.
Let us help you travel without stress. Why not explore the full Paxos collection today and find the best ShapeSafe bag for your travel style? We’re determined to make your next flight a hassle-free one and stop you spending your hard-earned holiday cash on unfair fines and penalties.
Getting in touch
If you’re not quite sure which Paxos model will be best for your travel style, don’t hesitate to reach out for help. We know how hard it can be to find the right cabin bag when airlines follow different rules but there’s no need to figure anything out alone. Our experienced advisors can guide you through your options, explain the differences between each product and help you pick the best model for your carrier’s requirements.
You can speak to one of our advisors directly by using the live chat feature on our site or by sending an email to info@cabinmax.com. Our team understands airline sizing inside out and is here to make the process simple.
With our expert advice and ShapeSafe™ protection, you can travel confidently knowing you’ve got the perfect Paxos bag for your needs.