How we choose
We haven't flown every bag we compare, and we don't pretend to have. Here is exactly what we do instead — and it's checkable.
Most travel-gear roundups lead with “we tested twenty backpacks” and hope you don’t ask how. We take the opposite approach: we state plainly that we have not physically tested every bag we compare, and we compete on a method that doesn’t need a test lab — reading each bag’s published specs and checking them against the airlines’ own limits, transparently and reproducibly. If you followed our steps with the same spec sheets and the same airline pages, you should reach the same conclusions.
1. We start from the specs, not the marketing
Every bag is evaluated on what its listing and the manufacturer actually publish: stated capacity, empty weight, external dimensions, materials, laptop-sleeve size and warranty. Each figure is read from the product listing on a dated visit, and that date is shown on the page. Where a maker doesn’t publish a figure — which is common for budget Amazon brands and their weight or dimensions — we print “Not published.”That empty cell is a finding, not a gap in our research: a brand that won’t state a bag’s dimensions is telling you something.
2. We do the carry-on fit math
This is the analysis competitors skip. A bag’s capacity in liters tells you how much it holds; it does nottell you whether it clears the sizer. So we compare each pack’s external dimensions against the published carry-on and personal-item limits for the major airlines — and give a plain-English “carry-on fit” read on every pack. Because backpacks are soft-sided, we’re explicit that how full you pack one changes whether it fits, and we flag the 40L packs that run right at the limit. All the airline numbers live in one place, our carry-on size guide, each cited to the airline’s own page.
3. Rankings are argued, not scored
You will not find a numeric “9.2/10” anywhere on this site. A score implies a measurement, and we haven’t measured these bags in a controlled test — slapping a number on a spec sheet would dress reading up as testing. Instead, our rankings are reasoned in plain language: which bag suits which traveler, why one wins for organization and another for a budget, and where the buyer-first choice is the cheaper option. That means an occasional “skip this” — which is the point.
4. Prices are live and dated — or they disappear
Every price on the site is pulled from a live retailer feed and stamped with the date it was pulled. We don’t store prices in our content, so a stale number can’t sneak onto a page. If the daily price check stops running, the numbers expire on their own within 48 hours and the buttons fall back to “Check price on Amazon” — the failure mode is silence, never a wrong figure.
5. We never fabricate proof
There are no invented reviews, testimonials, star ratings, or “we tested it” photos anywhere on Passage & Pier. Product images come from the retailer and are labeled as such. Verdicts are ours, written from the published specs and honest buyer-fit reasoning. If we can’t source something honestly, it doesn’t appear.
6. Commission never decides a recommendation
We earn affiliate commissions, and we disclose them everywhere. But the reasoning behind a pick is identical whether a link earns us anything or not. When a pricier bag on a program that pays us more is beaten by a cheaper one, the cheaper one is still our pick. Read the full affiliate disclosure and our editorial policyfor how that’s kept honest.
Where we could be wrong
Reading spec sheets is not the same as living out of a bag for a year, and we don’t claim it is. Materials get changed between production runs, a published dimension isn’t the only thing that decides how a bag carries, and airline rules change. Treat our guidance as a well-researched starting point, not a verdict from a test lab — and always confirm your airline’s current limit before you fly. If you find an error, tell usand we’ll correct it in the open.
Sources
- TSA — What are the size restrictions for carry-on bags? — TSA does not set carry-on dimensions — the airline does; TSA screens, it doesn't size (accessed July 21, 2026)
- Delta Air Lines — Carry-on baggage — Delta carry-on 22 x 14 x 9 in (45 linear in); personal item must fit under the seat (accessed July 21, 2026)
- American Airlines — Carry-on baggage — AA carry-on 22 x 14 x 9 in; personal item 18 x 14 x 8 in (accessed July 21, 2026)
- onebag.travel — carry-on backpack spec database — Republished manufacturer dimension/weight spec sheets used to cross-check pack figures (accessed July 21, 2026)
- Osprey — All Mighty Guarantee — Osprey's free-repair, any-product, any-era guarantee (accessed July 21, 2026)