Our 30L travel backpacks are designed for those who need just the right amount of space for short to medium trips. With a focus on comfort and durability, these backpacks are the ideal choice for quick getaways and everyday adventures. Thoughtful details, such as adjustable straps and multiple external pockets, make them the perfect travel packs for both work and play. Built with durable materials, they’re ready to carry your gear wherever life takes you.

Our Series 1 and Series 2 medium-sized expandable backpacks offer patented packing functions and flexibility. The Series 1 Medium provides 27 liters of capacity when unexpanded and up to 39 liters when expanded. Similarly, the Series 2 Medium holds 24 liters when unexpanded and up to 35 liters when expanded.

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The Best 30L Travel Backpacks

We designed the best 30L travel backpacks for One Bag Living. Perfect for work and leisure, Knack’s expandable design makes it easy to pack multiple outfits for shorter trips without sacrificing everyday functionality. Each bag doubles as a professional laptop backpack, featuring a padded compartment and smart organization for your accessories. Built with padded shoulder straps for all-day comfort, these carry-on backpacks strike the ideal balance between a spacious travel bag and a sleek everyday carry, making them perfect for both men and women. Stress less and enjoy more by choosing Knack’s 30L travel backpacks.

30L Backpack Features

  • Expand Your Horizons

    A separate, patented expandable suitcase compartment makes packing easier by providing up to 45% more carrying capacity. This innovative built-in suitcase design lets you conveniently access 2–3 changes of clothes with its easy-open lid. Whether you’re using it as a dedicated travel backpack or a versatile everyday bag, it’s built to keep up with your plans.

  • Stay Organized

    Keep your gear secure and easy to find with next-level organization, featuring fleece- and mesh-lined accessory pockets, a padded laptop compartment, and a discreet side-zip water bottle pocket.

  • Travel Set for Two Backpack Knack

    Be Compatible

    To make travel easier, our hidden trolley sleeve slides over the handle of nearly any wheeled luggage.
Travel Knack Backpacks

About Knack

Knack sprang from the simple observation that too many people were carrying too many bags at the same time. This aha moment spurred our passion to live a One Bag Life. So we pulled together a dedicated group of frequent travelers and bag enthusiasts––from Tumi, Coach, North Face, Samsonite, and eBags––to create the one bag that’s clever enough to replace two.

30L Travel Backpacks FAQs

Is the 30L Knack Backpack good for shorter trips?

Yes! Our 30L backpack features a patented expandable suitcase compartment that makes packing effortless. It fits 2–3 outfits plus everyday essentials in the main compartment, making it the perfect backpack for shorter trips and quick getaways.
How comfortable is the Knack 30L to carry?

Very. The 30L Knack features padded, adjustable shoulder straps and an ergonomic design that distributes weight evenly. Whether you’re using it as a spacious travel backpack or an everyday laptop bag, its comfort-first construction makes it easy to carry all day.
What organization features make this a good travel bag?

The 30L Knack Packs are built with smart external pockets, a padded laptop compartment, and multiple accessory pockets to keep your gear secure and organized. Designed for versatility, it transitions seamlessly from travel backpack to work bag to carry-on, adapting to whatever your day requires.
How is the 30L different from other Knack bag sizes?

The 30L Knack Pack is our mid-size option—large enough for multi-day travel but still compact for everyday carry. It offers the same laptop protection, organization features, and expandable design as other Knack sizes, but with the ideal balance of space and portability.

Testimonials

There is quite literally nothing I don't love about this bag. I almost went with the Large size because I traveled a lot more in my previous role. But you can get a surprising amount of stuff in the Medium. A smart packer can do a 3-day trip with just this backpack. If you're like me and you've looked and looked and thought and thought about this bag, stop looking, stop thinking, ADD TO CART, and get a bag that will not disappoint. Then sit back and plan to explain the bag to people because you'll get compliments and questions all the time.

Michael D

I got this Knackpack when I started my MBA at the Wharton School. I didn't realize what a cool pack it was until I started using it. After a year of traveling across the country for work and class, it still looks brand new. It has been rained on, thrown under airline seats, and stepped on in the classroom. I literally carry it every day, but you'd never know. It holds its form well, protects all my stuff, and has the perfect amount of space to pack for a workday (when not expanded) or a three or four day weekend (when expanded). The backpack that is changing the backpack. Great job, Knack!

Garry

As a flight attendant I am aleays looking for sustainable and practical packing solutions. This bag is exceptionally practical and convenient. Initially, I had concerns about its size, but it has proven to be ideal. It comfortably fits on top of my carry-on and is secured to the handle using the convenient slit on the back of the bag, ensuring that all my documents and devices remain within easy reach. I highly recommend this bag to flight crew

Jorge

The expandable main compartment is a game-changer—when zipped out, it easily holds enough clothes for a 3-4 night trip. I packed it for my current trip and was surprised by how much it fit without feeling bulky or overstuffed, and it fit under the plane seat.

Ryan

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