Hynes Eagle 40L vs MATEIN 40L

Search “cheap 40L travel backpack” and these two dominate the results. They occupy similar price territory and both claim 40 liters, which makes them look like alternatives. They aren’t really. The Hynes Eagle is a travel backpack built to a budget. The MATEIN is a commuter backpack that expands to travel volume. Deciding between them is mostly deciding which of those you actually want.

At a glance

The decisive difference: published numbers

Look at the table again. Hynes Eagle publishes weight and external dimensions; MATEIN publishes neither. Those “Not published” entries are not gaps in our research — they are the finding, and on a carry-on backpack they matter enormously.

Carry-on compliance is arithmetic. Knowing the Hynes Eagle is 20.1 x 13.4 x 9.8 inches lets you compare it to the 22 x 14 x 9 inch standard before you order and see exactly where it stands: height and width comfortably inside, depth running slightly over, which is normal for the class and usually fine on a soft pack that isn’t stuffed. You can make an informed decision.

With MATEIN you cannot do that calculation at all. The bag might fit your carrier perfectly — but you find out at the gate, with a bag you’ve already packed. For a bag whose entire selling point is being a carry-on, that’s a significant thing to be missing, and it’s the main reason we’d point most travelers to the Hynes Eagle.

The hip belt gap

The Hynes Eagle has a real hip belt. It’s basic — nothing like the padded, frame-backed belt on an Osprey Farpoint— but it exists and it transfers some load. The MATEIN has nothing of the kind; it’s a shoulder-carry bag.

At 40L that’s a meaningful difference, because 40 liters of clothes is commonly 20–30 lb, and shoulders carrying all of it for twenty minutes is genuinely unpleasant. If the bag is for travel, this alone justifies the Hynes Eagle. If the bag is for commuting with occasional trips, it barely matters — nobody uses a hip belt on a train to work.

Where MATEIN legitimately wins

Three things, and they’re real:

• The expansion.Slim for daily use, expanded for a trip. That versatility is genuine, and the Hynes Eagle has no equivalent — it is a 40L bag all the time, which looks odd carried to an office.
• The 17-inch laptop sleeve.Larger than the Hynes Eagle’s 15.6 inches, and a real advantage if you carry a big machine. See our laptop backpack roundup for that whole field.
• The USB pass-through. A commuter feature rather than a travel one, but if you want it, only one of these has it.

Notice the pattern: every MATEIN advantage is a commuteradvantage. That is the honest characterization of this bag — it is a good, cheap commuter backpack that can expand for a trip, not a travel pack that also commutes.

The expansion is a gate risk

Worth stating plainly because the marketing never does. An expandable bag fits the sizer unexpanded and can breach it expanded — and you expanded it because you had more to carry, which is exactly when you need it to pass. Combine that with unpublished dimensions and the carry-on question is unresolved in both states.

Practical advice if you buy it: measure it yourself in both configurations when it arrives, write the numbers down, check them against your carrier on the size guide, and fly anything strict with it zipped down. On European budget carriers, neither of these bags fits the free small-bag allowance — see our Europe roundup.

Neither has a warranty

Both list no published warranty, and that is the shared, unavoidable cost of buying at this price. When a bag in this class fails, that bag is done. Plan for a few-years purchase rather than a buy-it-for-life one — and if you travel often enough that the maths changes, our budget roundup makes the case for spending up properly.

The verdict

For travel, buy the Hynes Eagle 40L. It has the hip belt, the true clamshell and — most importantly — the published dimensions that turn the carry-on question from a gamble into arithmetic. It is also remarkably light at 2.2 lb, lighter than packs costing three times more.

Buy the MATEIN 40Lif the bag is primarily a commuter that needs to expand for occasional trips, if you carry a 17-inch laptop, or if you want the absolute cheapest entry into a large-capacity backpack and your flying is on carriers that don’t enforce sizers aggressively. Just go in knowing what the missing numbers mean.