The published figures, side by side
- Capacity.The Farpoint is 40 L, fixed. The Peak Design is three numbers: 30 L cinched down, 35 L standard, 45 L expanded — and Peak Design itself labels the 35 L configuration its “max carry-on” mode. Read the comparison as 40 L against 35 L for flying and 40 L against 45 L for the trip home.
- Empty weight.3.1 lb against 4.5 lb. The Peak Design is 1.4 lb heavier — 45 percent more bag before anything goes in it. As capacity per pound: the Farpoint gives 12.9 L/lb, the Peak Design 7.8 L/lb in standard mode and 10.0 L/lb fully expanded. On this site only wheeled bags carry worse ratios.
- External dimensions. 21 x 15 x 10 in against 22 x 13 x 9.5 in standard (11 in deep expanded). The Peak Design is an inch taller and two inches narrower.
- Laptop. 15 in against 16 in, plus a separate tablet sleeve on the Peak Design. If your machine is a 16-inch MacBook Pro, that is not a preference, it is the answer.
- Hip belt. Osprey publishes a padded, load-bearing hip belt on a structured back panel. Peak Design publishes nonefor the 45L — the hip belt is a separate accessory in its 30L listing and is not stated here at all. This is the single largest difference on the page and it is the one a spec table buries.
- Material. Nylon ripstop against a weatherproof 100% recycled 400D nylon shell over a 900D bottom liner. The Peak Design is the more weather-capable shell of the two as published; neither is waterproof, and nothing with a travel zipper is.
- Warranty. Both are lifetime terms and they are not equivalent. More on that below, because the difference is in the exclusions rather than the headline.
The exterior-volume finding
Capacity is the number on the label. The number that decides whether you board with your bag is the exterior, and the honest way to compare two exteriors is to multiply them out.
- The allowance. 22 x 14 x 9 in = 2,772 cu in, which is about 45.4 liters of box.
- Osprey Farpoint 40. 21 x 15 x 10 in = 3,150 cu in (51.6 L of box) around 40 L of cargo.
- Peak Design 45L, standard. 22 x 13 x 9.5 in = 2,717 cu in(44.5 L of box) around 35 L of cargo — the only figure in this group that is under the allowance by volume.
- Peak Design 45L, expanded. 22 x 13 x 11 in = 3,146 cu in (51.6 L of box) around 45 L of cargo.
Read the second and fourth lines together. A Farpoint 40 and a fully expanded Peak Design 45L occupy the same volume of bin to within four cubic inches — and at that size the Peak Design is carrying five more liters. In its standard mode the Peak Design is smaller than the allowance itself, at 2,717 cu in against 2,772, which no other 40-liter-class pack on this site manages. The same arithmetic applied to every bag we cover is in how many liters is a carry-on.
None of that means the Peak Design walks through a sizer and the Osprey does not. Volume is not the test; three independent dimensions are, and a sizer does not care that your bag’s total is under budget if one side of it is over.
Fit: one failure by half an inch against two failures by an inch
Against the 22 x 14 x 9 in box American, Delta, United, JetBlue and Alaska publish:
- Peak Design 45L, standard mode: height 22 in (level with the limit), width 13 in (1 in of margin), depth 9.5 in (0.5 in over). One failure, by half an inch.
- Peak Design 45L, expanded: depth 11 in (2 in over). Still one failure, now a serious one. Peak Design does not call the expanded bag a carry-on and neither do we.
- Osprey Farpoint 40: height 21 in (1 in of margin), width 15 in (1 in over), depth 10 in (1 in over). Two failures, an inch each.
Width is the Farpoint’s quiet problem and the reason it occasionally gets stopped when a taller bag walks past: at a published 15 inches it is wider than a 14-inch limit before you pack it. Both bags are soft and both compress, so in practice both clear US gates routinely — but “over on one side” and “over on two” are different risks at a European sizer, where the frame is a fixed box rather than an agent’s eye.
For a worked example of what that means at a strict carrier: Ryanair’s priority cabin bag is 55 x 40 x 20 cm, which is roughly 21.7 x 15.7 x 7.9 in. Both bags are over on depth there — the Peak Design by 1.6 in in standard mode, the Farpoint by 2.1 in — and the Farpoint is also level on width where the Peak Design has 2.7 inches to spare. Neither is a Ryanair priority bag on paper. Our 40L fit guide and how to measure a backpack cover doing this for your own carrier, packed, at the widest point.
Weight, against the limits that actually exist
The five biggest US carriers publish no cabin weight limit, so on a domestic itinerary 1.4 lb of extra empty bag is an effort problem and nothing more. Elsewhere it is an allowance problem:
- Emirates and Qantas, 7 kg including the bag (15.4 lb). An empty Farpoint is 20 percent of that. An empty Peak Design is 29 percent— nearly a third of the allowance gone before you pack a shirt.
- Lufthansa, 8 kg (17.6 lb). 18 percent against 26 percent.
- Ryanair, 10 kg for the priority bag. Both are comfortable here; depth is the binding constraint on that carrier, not mass.
And there is a second-order effect worth naming, because it is the thing people underestimate about an expandable pack: a bag that can become 45 liters tends to end up holding 45 liters.The Farpoint’s fixed 40 L is a budget you cannot overspend. Every published empty weight on this site, from 0.16 lb to 7.5 lb, is tabled in how much does a travel backpack weigh, and the carrier-by-carrier ceilings are in carry-on weight limits. If 4.5 lb on your shoulders is the part that puts you off, the honest alternative is not a lighter pack but wheels — the MATEIN rolling backpack is 4.9 lb and carries almost none of it on your body.
The harness is the decision for most people
Here is the asymmetry that settles this comparison for a majority of readers. The heavier bag is the one with no published hip belt.
Osprey states a padded hip belt attached to a structured back panel. That combination — belt plus panel plus frame — is the mechanism that transfers load onto your pelvis and demotes the shoulder straps to stabilizers. Peak Design publishes no hip belt for the 45L. It lists one as an optional accessory on the 30L, which tells you the company knows the harness benefits from it; it is not stated for this bag.
So a packed Peak Design starts 1.4 lb heavier and puts all of that on your shoulders. That is fine in the use case the bag is designed around: a photographer or a commuter who carries it in bursts, between a car, a hotel room and a shoot. It is not fine on a forty-minute walk from a train station with two weeks of clothes in it. Our hip-belt roundup separates the packs whose maker states a genuine load-bearing belt from the ones with two courtesy webbing loops, and why does my backpack hurt my shoulders explains the mechanism and the strap order that most people reverse.
What the Peak Design buys that the Osprey cannot
Four doors instead of one
The Farpoint is a clamshell: it opens flat, like a suitcase, from the front. That is a genuinely good design and it is the reason clamshell packsdominate one-bag travel. The Peak Design opens from the rear, the front, both sides and the top. If your trip involves taking a lens or a laptop out of a bag that is still on your back, or packing around a camera cube, that is not a convenience feature — it is the whole reason the bag exists, and nothing in the Osprey line answers it.
Three sizes in one shell
Cinched to 30 L it is a large daypack. At 35 L it is a carry-on. Expanded to 45 L it is a checked bag or a hold-everything for the flight home. That range genuinely replaces two bags for some travelers, and it is the honest case for the price. It is also why its weight is what it is: the zips, the external frame structure, the metal hardware and the four access doors all weigh something.
A 16-inch laptop sleeve
15 in against 16 in, plus a dedicated tablet sleeve. For most machines this is noise; for a 16-inch laptop it is disqualifying in one direction. If your laptop is 17 inches, neither of these is your bag — see best travel backpacks for a 17-inch laptop.
Two lifetime warranties, and why they are not the same
Both makers use the word lifetime. The difference is in what each one excludes, which is where warranty documents do their real work.
Osprey’s All Mighty Guarantee covers any Osprey product from any era, repaired or replaced free, regardless of when or where it was purchased. There is no registration, no receipt condition and no channel restriction.
Peak Design’s lifetime warrantycovers manufacturing defects and failures that render part or all of the product non-functional. It excludes cosmetic wear, misuse, apparel, Factory 2nds, and — the clause worth knowing — products bought on secondhand marketplaces or auction sites. Given these bags hold their value and get resold constantly, that exclusion is a real cost rather than boilerplate: a used Farpoint is still fully guaranteed, a used Peak Design is not. Every warranty on this site is quoted in its own words in how long do travel backpacks last.
The decision
Carry a lot, walk a lot, keep it a decade: Farpoint 40. Lighter, belted, unconditionally guaranteed, and a fraction of the price. The width is its real flaw and it is worth knowing about before a trip on a strict carrier, but it is one inch on a soft bag.
Shoot photos, change bag size trip to trip, or need a 16-inch laptop sleeve: Peak Design 45L — and fly it in standard mode, where it is the slimmer and more compliant of the two. Accept the 4.5 lb and the absence of a published belt as the price of the modularity, because that is exactly what they are.
Want a bag that simply fits: neither. The tomtoc 40L publishes 20.5 x 13 x 9 in, which is inside the standard box on height, width anddepth, at 2.65 lb, with a 17.3-inch laptop sleeve, for a mid price. Its harness is simpler than the Osprey’s and its warranty is a one-year term (two with registration) rather than a lifetime one. If clearing every sizer you meet is the criterion, it wins on the only evidence available — which is why it is the third pick on this page rather than a footnote.
