Buying luggage should be simple – but the options can feel endless. Carry-on or check-in. Polycarbonate or aluminum. Zipper or frame. Expandable or fixed. Each choice shapes how travel feels for years.
This guide walks through every decision in order – size, material, closure, components, and support – so readers can choose a suitcase that fits the way they actually travel.
Browse all Monos luggage: Carry-On • Check-In • Aluminum • Hybrid • Expandables
Step 1 – Start with how you travel, not what looks good
The right suitcase depends on a few honest answers:
- How long are most trips? Weekends, a week, or multiple weeks?
- How often? A few times a year, or every month?
- Which airlines? US domestic, international full-service, or budget carriers?
- Where does the suitcase go after the airport? Taxis and hotels, or trains, stairs, and cobblestones?
- How do you pack? Minimalist, planner, or "bring options"?
The guiding principle: choose luggage for the trips that happen most often, not the one big trip that happens once.
Step 2 – Choose the size
Size is the biggest decision. Most travellers need one carry-on and one check-in eventually – but which to buy first depends on travel habits.
| Size | Typical trip length | Best for |
|---|---|---|
| Carry-On | 1–5 days | Frequent flyers, short trips, avoiding baggage claim |
| Carry-On Plus | 4–7 days | Slightly longer trips while staying carry-on sized on most airlines |
| Check-In Medium | 1–2 weeks | Most international trips, versatile capacity |
| Check-In Large | 2+ weeks | Extended stays, family travel, winter packing |
Size guides: How to choose a carry-on • Carry-on size limits by airline (2026) • Best check-in luggage for international travel
Step 3 – Choose the material
The two premium options are polycarbonate and aluminum. Both are built for real travel – they simply age differently and feel different in hand.
- Polycarbonate: lighter, flexes under impact, shows wear as scuffs and scratches. Best for frequent travel and weight-limited airlines. Monos uses aerospace-grade Makrolon polycarbonate.
- Aluminum: heavier, more structured, dents rather than cracks, develops a patina over time. Best for travellers who want a premium material experience and don't mind visible character.
Learn more: Polycarbonate vs aluminum luggage explained • What is Makrolon polycarbonate? • Inside Monos' Aluminum Collection
Step 4 – Choose the closure
Closure affects security, structure, and how forgiving the suitcase is when packed full.
- Zipper: familiar, flexible, and allows expansion. Slightly more forgiving when overpacked. The standard on most luggage.
- Frame (zipperless): latches and a rigid frame. More tamper-resistant, holds shape under pressure, and removes the zipper as a failure point. Requires more disciplined packing. Used on the Monos Hybrid collection.
Read more: Why Monos chose a zipperless frame • Hybrid vs aluminum luggage
Step 5 – Decide on expandability
Expandable luggage adds a zip-out gusset for extra capacity. It's useful for return trips with gifts or shopping – with one caveat: an expanded carry-on may exceed airline limits. Expandables make the most sense on check-in bags, or on carry-ons used with the expansion zipped away when flying.
Shop: Expandables.
Step 6 – Check the components that matter most
Shells get the attention, but components determine how a suitcase feels every day – and what breaks first.
- Wheels: look for quiet, smooth-rolling spinner wheels. Monos uses Hinomoto Lisof Silent Run wheels.
- Handle: stable when extended, minimal wobble with a bag stacked on top. Monos uses a high-grade aluminum telescopic handle with an ergonomic underside release.
- Interior: compression pads, durable lining (350D polyester on Monos), and a layout that fits how you pack.
- Locks: TSA-approved combination locks, ideally built in.
Deep dives: How Monos' telescopic handle is different • What actually breaks on luggage • Luggage lock help
Step 7 – Understand the warranty
Every luggage warranty is a limited program with defined coverage and exclusions. The questions worth asking:
- Which components are covered?
- Is airline damage included, or available as an add-on?
- Are there fees after a certain number of years?
- How simple is the claims process?
Monos offers a limited lifetime warranty on wheels, handles, locks, zippers, and functional shell damage – with optional Lifetime Warranty+ upgrades that add airline damage and lost luggage coverage. Details: Warranty and repairs. Compare brands: Luggage warranty comparison.
Step 8 – Set realistic expectations for wear
Every suitcase shows the journey. Polycarbonate scuffs. Aluminum dents. Corners wear first. None of that is a defect – it's the material doing its job. What matters is whether the suitcase keeps performing.
Read more: Scuffs and scratches on luggage • The life of a suitcase
Quick recommendations by traveller type
- Frequent flyer, short trips: Carry-On (polycarbonate)
- Business traveller with a laptop: Carry-On Pro – see the business travel guide
- International traveller, 1–2 weeks: Check-In Medium plus a carry-on
- Family or extended stays: Check-In Large or Expandable Check-In
- Wants security and structure: Hybrid Carry-On or Check-In
- Wants a premium material experience: Aluminum Carry-On or Check-In
- Comes home with more than they left with: Expandable Carry-On or Check-In
For the full 2026 carry-on breakdown: Best carry-on luggage of 2026.
Before you buy: a five-point checklist
- Dimensions – with wheels and handles – fit the airlines you fly most
- Empty weight leaves room under the limits that apply to you
- Material and closure match your preferences and packing style
- Wheels and handle feel stable when the case is packed
- Warranty covers what matters, with a return window to test it on a real trip
