Discover Knack's range of patented expandable bags, perfect for both travel as well as daily commuting. Our collection includes expandable backpacks in various sizes and colors. Whether you’re exploring the world or simply heading to work, a Knack expandable bag adapts to the needs of your day.

Sort by

11 products
Filter and sort
Filter and sort

11 products

Laptop Size
Clear
Outfits
Clear
Clear

11 products

Expandable Travel Bag Collection

Explore Knack’s' Expandable Travel Bag Collection, perfect for travel, work, and daily life. Each bag seamlessly transitions to an expandable travel bag from an everyday backpack, making it easy to adjust for bigger loads or pack for extended trips. Our expandable carry-on bags combine sleek, professional design with durable, water-resistant materials. Built with next-level organization pockets for tech, toiletries and accessories, Knack Bags are designed for modern professionals. Enjoy style, comfort, and adaptability in one smart, expandable bag.

Expandable Travel Bag Features

  • Series 2: Large Expandable Knack Pack Backpack Knack#color_midnight-black

    Expand Your Horizons

    Separate, patented, expandable suitcase compartment makes packing for travel easy by giving you 45% more carrying capacity. Easily access multiple changes of clothes with a convenient suitcase lid.

  • Business Trip Travel Set Series 2 Backpack Knack

    Stay Organized

    Keep all your gear secure and easy to find with next-level organization, including everything from fleece and mesh accessory pockets to a hidden side-zip water bottle pocket and a padded laptop pocket.

  • Be Compatible

    To make your travels easier, our hidden trolley sleeve lets you slip your Knack over the handle of almost all sizes of wheeled luggage.
Knack Backpacks Travel Everyday Commute Backpack

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.

Expandable Bags FAQs

How much extra space do I get when I expand a Knack Pack?

The extra space from Knack Packs expandable sections depends on what bag you choose. Typically the expansion capabilities increase bag capacities by about 40-45%. For example, the Series 2 Medium Knack Packs expand from 24L to 35Ls.

Where is the expansion zipper located on the bag?

The zipper pull for the expandable compartment is hidden underneath the rain flap at the bottom of the bag—near the suitcase compartment area.
Can I lock the expandable compartment for security?

Yes, the Knack Packs come equipped with lockable zippers on the main back compartment and the expandable section. This allows you to secure your belongings with metal, cord, or cable locks when traveling.
Will expanding the bag change its comfort or carry style?

Expanding the bag does increase its depth, but the Knack Pack is designed for comfort both compressed and expanded. You can still easily carry it as a backpack, and the Series 2 even includes a hidden side handle to carry the bag like a briefcase if you prefer a different carry style on busy travel days.

Testimonials

If you travel often or juggle work and life on the go, the Knack Series 2 Backpack (Large) might be the only bag you need.

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

I'm traveling every week and rely on my bag to hold my gear but also look good in a meeting room. I must have looked at over 400 laptop bags. I even bought a couple of things and had to return them. The Knack is perfect. I love it! I love the pockets, I love the quality, I love the expansion. It's got some thoughtful touches (the mesh pockets let you see everything in them, the key fob is long enough to be useful).

Eric F.

This backpack carries a lot for its size and is very comfortable on the whole... Expansion option adds a lot of flexible storage and does not feel bulky when full.

Christine C.

This is a GREAT EDC bag that is also great for a 2 day trip due to its ability to expand. I’ll tell you what I love about it, then I’ll suggest some areas where I think there’s some opportunity for improvements.

John C.

Check out these blogs:

  •  

    Expandable Suitcase Backpacks for Worry-Free Travel

    read more
  •  

    Travel Like a Pro: 19 Essential Business Travel Hacks

    read more
  •  

    Best Weekender Travel Bag for Your Next Adventure—and Every Day Routine

    Read more