Rain, spray and wet boat decks call for a travel pack that keeps gear dry.
These are the driest 40L travel picks.
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Quick Picks
- Best waterproof duffel: Thule Chasm Duffel
- Best water-resistant: Maelstrom 40L Waterproof Backpack
- Best roll-top: Haimont 40+15L Roll-Top
- Best laptop protection: tomtoc Navigator-T66 40L
- Best camera: RAINSMORE Waterproof Camera Backpack
Comparison Table
| Product | Best for | Capacity | Standout feature | |
|---|---|---|---|---|
| Thule Chasm Duffel | Best waterproof duffel | 40L size | 840D waterproof laminate | View |
| Maelstrom 40L Waterproof Backpack | Best water-resistant | 40L | 9 pockets, water-resistant fabric | View |
| Haimont 40+15L Roll-Top | Best roll-top | 40-55L | Roll-top expands to 55L | View |
| tomtoc Navigator-T66 40L | Best laptop protection | 38-40L | Separate laptop compartment, PFAS-free | View |
| RAINSMORE Waterproof Camera Backpack | Best camera | 15.6″ laptop | 6 dividers, rain cover | View |
Detailed Reviews
1Thule’s Chasm is a rugged, weather-resistant duffel made from 840D nylon with a waterproof laminate. It has a wide-mouth opening and converts from duffel to backpack in seconds.
Internal mesh pockets organize small items. The Chasm comes in several sizes; choose the 40L version for carry-on and long-weekend trips. It is the duffel we would trust on a rainy boat dock or a dusty truck bed.
Pros & Cons
What we like
- Very tough 840D laminate
- Wide-mouth opening
- Converts to backpack
Watch out for
- Backpack straps are basic
- Pick the size carefully
Key Specs
- Capacity: choose the 40L size
- Fabric: 840D nylon, waterproof laminate
- Carry: duffel or backpack
- Organization: internal mesh pockets
2This version of the Maelstrom swaps to a more water-resistant fabric and spreads storage across nine pockets: the main compartment, two front zip pockets, two hip-belt pockets, two side pockets and two mesh pockets.
The brand lists the pack at about 13.4 x 8.6 x 22 inches, a tall and narrow shape that stays close to your back on narrow trails and in crowded train aisles. Hip-belt pockets are the standout here; snacks, a phone and a map stay reachable without stopping. Like the standard Maelstrom it has no real frame, so treat it as a big daypack rather than an overnight hauler.
Pros & Cons
What we like
- Two hip-belt pockets for snacks and phone
- Water-resistant fabric
- Slim profile for trails and transit
Watch out for
- No frame for heavy loads
- Back panel runs warm in summer
Key Specs
- Capacity: 40 liters
- Size: about 13.4 x 8.6 x 22 in (brand listing)
- Pockets: 9 including 2 hip-belt pockets
- Fabric: water-resistant nylon
- Frame: none
3Haimont’s roll-top pack starts at 40 liters and expands to 55 liters, so one bag covers fast summer overnights and bulkier shoulder-season trips. Vertical compression straps shrink it down when it is not full.
A dual-density foam hip belt, shaped shoulder straps, an adjustable sternum strap and a breathable back panel make it carry more like a backpacking pack than a big daypack. It is a newer listing, so long-term durability data is still thin.
Pros & Cons
What we like
- Expands from 40L to 55L
- Roll-top keeps rain out of the top
- Dual-density hip belt
Watch out for
- Newer listing, few reviews
- Roll-top is slower to open
Key Specs
- Capacity: 40L, expands to 55L
- Closure: roll-top
- Hip belt: dual-density foam
- Rain cover: included
4The tomtoc Navigator-T66 is a structured, carry-on travel backpack with a separate laptop compartment and lots of internal organization. tomtoc lists it at 20.47 x 12.99 x 9 inches, with usable capacity of about 38 to 40 liters depending on how you pack.
It is built for flights and cities, not trails: think airline cabin bag with good straps rather than a hiking pack. The fabric is PFAS-free, and the stiff sides hold their shape so packing cubes slide in and out easily.
Pros & Cons
What we like
- Dedicated laptop compartment
- Structured shape suits packing cubes
- PFAS-free materials
Watch out for
- Not built for hiking
- Heavier than soft travel packs
Key Specs
- Capacity: about 38-40 liters
- Size: 20.47 x 12.99 x 9 in (brand listing)
- Laptop: separate compartment
- Materials: PFAS-free
5RAINSMORE’s waterproof camera backpack has thick padded dividers, six adjustable sections, a 15.6-inch laptop slot, a rain cover and tripod straps.
It is a solid outdoor-ready budget pack.
Pros & Cons
What we like
- Thick dividers
- Rain cover
- Laptop slot
Watch out for
- Newer brand
- Generic harness
Key Specs
- Laptop: 15.6 in
- Dividers: 6
- Extras: rain cover, tripod straps
How We Chose
We compared capacity, fit range, weight, carry system, materials, pockets and carry-on dimensions across dozens of backpacks, then read verified owner feedback to find comfort and durability problems that spec sheets miss. We did not receive free products, and we do not claim hands-on testing. TOR Scores combine published specs, verified owner feedback and overall value. Related: our shortlist of the best 40L backpack travel picks.
Waterproof vs Water-Resistant Backpacks
Waterproof backpacks use roll-top closures, welded seams and coated fabrics, so they keep gear dry in heavy rain and spray. Water-resistant packs shed light rain but can leak at zippers and seams. For boating, kayaking and heavy rain, choose a roll-top dry bag backpack or add a rain cover and liner. If you are comparing options, our guide to the best 40L backpack for travel is worth a look.
How to Choose a 40L Travel Backpack
A 40L travel backpack is the classic one-bag size. It holds a week or more of clothes and usually still fits within carry-on limits, so you skip checked-bag fees and baggage-claim waits. For a different angle, see our picks for the best 40L backpack with wheels.
- Carry-on size. Many US airlines allow carry-on bags around 22 x 14 x 9 inches, but international and budget carriers are often stricter. Always check your airline before you fly.
- Clamshell opening. A zip that opens the bag like a suitcase makes packing and finding items much easier than a top-loader.
- Compression. Straps that cinch a half-full bag keep it inside size limits and stop contents from shifting.
- Laptop sleeve. A separate sleeve speeds up security screening and protects your device.
- Harness. Padded straps, a sternum strap and a hip belt make a big difference when you walk from the station to your hotel.
- Security. Lockable zippers and hidden pockets help in crowded places.
Packing cubes turn a 40L bag into a tidy, easy-to-unpack system. Roll clothes rather than fold them, and wear your bulkiest shoes and jacket on travel days. For a closer look, see our guide to the best 40L travel backpack women.
Carry-On Rules for 40L Backpacks
Liters measure volume, not dimensions, so a 40L pack can be either carry-on friendly or too long depending on its shape. Check the listed dimensions, not just the capacity. We cover this in more depth in our roundup of the best 40L travel backpack for women.
- Main carry-on. Many US carriers allow roughly 22 x 14 x 9 inches. Most 40L travel packs are built around that size.
- Personal item. Budget airlines often limit free personal items to about 18 x 14 x 8 inches or less. The LOVEVOOK 40L is marketed for that size, but rules vary by airline and fare.
- Weight limits. Some international airlines cap carry-on weight at 7 to 10 kg. Heavy wheeled bags use up a lot of that allowance before you pack anything.
- Liquids. Keep liquids, gels and aerosols in a quart-size bag in an outside pocket so you can pull them out quickly.
Gate agents care about how the bag looks, too. A compressed, tidy pack that fits the sizer is far less likely to be challenged than an overstuffed one.
Related guides: best 40l waterproof backpack, best 40l dry bag backpack, best 40l travel backpack carry on. Browse every pick in our Backpacks category.
Sources and further reading: National Park Service: the Ten Essentials, Leave No Trace: the 7 Principles and National Park Service: camping basics. Product specs come from brand listings on Amazon; always check your airline’s current carry-on size rules before you fly.
Frequently Asked Questions
Are 40L backpacks waterproof?
Most are water resistant; use a rain cover or liner, or choose a roll-top waterproof pack.
Is a 40L backpack carry-on size?
Many are designed around common carry-on limits, but airlines differ; check dimensions and your airline’s rules.
How many days of travel can a 40L backpack hold?
With packing cubes and quick-dry clothes, many travelers fit five to seven days.
How do I clean a backpack?
Empty it, brush out dirt, hand wash with mild soap and air dry; avoid machine washing unless allowed.
Can a 40L pack hold a laptop?
Travel and commuter packs usually have a padded laptop sleeve; hiking packs often do not.
Final Verdict
The Thule Chasm 40L keeps travel gear driest.
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