Nomatic Travel Backpack 30L vs Cotopaxi Allpa 35L: Which Should You Buy?
The Nomatic Travel Backpack 30L and the Cotopaxi Allpa 35L are two of the most recommended one-bag carry-ons, but they solve the problem from opposite directions. The Allpa is a packing-first suitcase you wear on your back. The Nomatic is a tech-first daily carry that expands into a travel bag. Both clear standard carry-on limits, so the real choice is about how you pack and what you carry.
This comparison draws on published manufacturer specifications, aggregated owner reviews, and community feedback from Reddit and one-bag travel forums. We have not personally tested either pack.
Nomatic Travel Backpack 30L
Quick Verdict
Best Overall Value
Best for Tech and Commuting
Best Capacity for One-Bag Trips
Best for Tight Cabins and Personal-Item Use
The short version: pick the Allpa if you want the most space and the easiest packing for the money, and pick the Nomatic if your bag does double duty as a commuter and tech carry that occasionally travels. The Allpa is the better pure travel pack. The Nomatic is the better everyday-into-travel hybrid.
Side-by-Side Specs
| Spec | Nomatic 30L | Cotopaxi Allpa 35L |
|---|---|---|
| Price | $310 | $230 |
| Volume | 30L (expands from 20L) | 35L |
| Dimensions | 18.9 x 13 x 8.5 in | 21.3 x 13 x 8.3 in |
| Weight | 4.0 lbs | 3.4 lbs |
| Material | Tarpaulin-style, water-resistant | 1000D recycled polyester |
| Laptop sleeve | Up to 15 in | Up to 15 in |
| Main opening | Suitcase-style clamshell | Suitcase-style clamshell |
| Shoe compartment | Yes, ventilated | No |
| Water bottle pocket | Internal magnetic, lined | External stretch mesh |
| Expandable | Yes, 20L to 30L | No |
| Luggage pass-through | Yes | Yes |
| Lockable main zipper | Yes | Yes |
| Warranty | Lifetime limited | Lifetime limited |
The headline numbers favor the Allpa: it holds more, weighs less, and costs less. The Nomatic earns its place on features the Allpa does not have, namely the expansion zipper, the ventilated shoe compartment, and a deeper tech setup.
Round by Round
The Allpa opens into a full clamshell that lies flat like a hard-sided suitcase, with a zippered mesh lid on each side so you can see everything at once. At 35L it swallows more than its size suggests and pairs naturally with packing cubes. The Nomatic also opens suitcase-style, but at 30L fully expanded, and a chunk of its volume is given over to dedicated compartments rather than open packing space. For clothes-forward, one-bag trips the Allpa simply carries more and packs faster.
The Allpa is the lighter pack by a meaningful margin despite holding more. The Nomatic carries a weight penalty from its rigid structure, hardware, and the extra compartments. Over a long day on your back, or against a strict weight allowance on a budget carrier, the difference is noticeable.
This is where the Nomatic pulls ahead. It is built around tech carry, with a clamshell laptop sleeve, RFID-safe pockets, cord pass-throughs, a magnetic water bottle pocket that tucks flat when empty, and a ventilated shoe compartment. The Allpa organizes well for clothing through its mesh-lidded compartments, but it has no dedicated tech or shoe storage. If your bag spends most of its life as a commuter and only sometimes flies, the Nomatic fits that life better.
The Allpa uses a heavy 1000D recycled polyester that feels rugged and resists abrasion, backed by chunky lockable YKK zippers. The Nomatic uses a tarpaulin-style shell that sheds water better and wipes clean, with reinforced zippers of its own. Neither is fragile. Choose the Allpa for raw abrasion resistance and the Nomatic if wet-weather resistance matters more to you.
Both bags sit inside the carry-on limits of the major US and European full-service carriers. The Nomatic has the smaller footprint and, because it cinches from 30L back down to 20L, it can drop to a size that rides as a personal item under most seats. The Allpa is a true full-size carry-on with no way to shrink. On the strictest budget carriers, the Nomatic gives you more room to maneuver.
The Allpa costs less while giving you more capacity, less weight, and a heavier-duty fabric. The Nomatic asks for more money and returns its value through features rather than space. Unless those tech and shoe features are the reason you are buying, the Allpa is the stronger value.
The Core Difference: Travel Pack vs Travel Hybrid
The cleanest way to choose is to decide what the bag is for most of the time. The Allpa is a dedicated travel pack. It does one job, packing a lot of clothing and gear into a suitcase-style body, and it does that job better than almost anything at its price. It is not trying to be your daily commuter.
The Nomatic is a hybrid. It is designed to be carried every day as a tech bag, then expanded and packed for a short trip when you need it. That flexibility is the whole point, and it is why the Nomatic includes the expansion zipper, the shoe pocket, and the deep tech organization that add weight and eat into open space. If you want one bag that lives at your desk and occasionally flies, that trade makes sense. If you want a pack that exists to travel, the Allpa is the more focused tool.
Dimensions and Airline Compliance
Both packs clear the cabin limits of carriers like United, Delta, British Airways, and Lufthansa, where soft 30L to 35L bags pass routinely. The catch, as always, is the strict European budget carriers, whose free or small-bag tiers are tight on depth. The Nomatic has the advantage here because it can be cinched down toward its 20L size and ride as a personal item, while the Allpa is a fixed full-size carry-on. For the specifics by airline, see our carry-on size limits guide and the dedicated Ryanair backpack guide. Packing for a longer trip with either bag? Our walkthrough on how to pack two weeks in a carry-on applies to both.
Who Should Buy Which
Buy the Cotopaxi Allpa 35L if you
- Want the most packing space for the money
- Prefer a lighter pack on long carry days
- Pack clothes-forward and use packing cubes
- Want a rugged, abrasion-resistant fabric
- Need a dedicated travel pack, not a daily bag
Buy the Nomatic 30L if you
- Carry a lot of tech and want it organized
- Want one bag for the commute and short trips
- Value a ventilated shoe compartment
- Need a bag that shrinks to personal-item size
- Prefer a sleek, office-appropriate look
Frequently Asked Questions
Is the Nomatic 30L or the Cotopaxi Allpa 35L better for one-bag travel?
For pure one-bag travel, the Allpa is the better pick. It holds more, weighs less, and opens into a full suitcase-style clamshell that packs faster. The Nomatic is better if your bag also serves as a daily tech carry and only travels occasionally.
Which one holds more?
The Allpa, at 35L versus the Nomatic’s 30L. The gap feels larger in practice because more of the Allpa’s volume is open packing space, while the Nomatic devotes part of its capacity to dedicated tech and shoe compartments.
Do both fit airline carry-on limits?
Both sit within the published carry-on limits of the major US and European full-service carriers. The Nomatic has a smaller footprint and can be cinched from 30L down to 20L, so it can also ride as a personal item on stricter cabins. The Allpa is a fixed full-size carry-on with no way to shrink.
Which is the better value?
The Allpa. It costs less than the Nomatic while offering more capacity, less weight, and a heavier-duty fabric. The Nomatic justifies its higher price through its tech organization, shoe compartment, and expandable hybrid design rather than through space.
Which is more comfortable to carry?
The Allpa is lighter and transfers weight to a hip belt, which helps on long carries. The Nomatic carries well for its category but is the heavier of the two before you add anything to it. If all-day comfort with a full load matters most, the Allpa has the edge.
Related Resources
Last updated: July 2026. We research backpacks based on published specifications, owner reviews, and airline enforcement patterns. We have not personally tested every bag reviewed on this site.