Our medium backpacks are the ultimate must-have for anyone who wants one bag for every adventure, business or pleasure. Perfectly sized for both weekdays and weekends, these sleek expandable packs easily hold your laptop, daily essentials, and up to three changes of clothes—no bulk, just smart organization. Don’t settle for ordinary: upgrade to the most versatile and stylish medium backpack designed for busy, on-the-go lives.

 

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Shop Medium Backpacks

Our Medium Size Backpack Collection is designed for modern professionals seeking versatility and style. A medium backpack perfect for work, travel and daily use, each Knack Pack expands to fit everything you need while maintaining a sleek profile. These medium-sized backpacks feature advanced organization pockets for tech, accessories, and essentials, making them ideal for busy workdays and multi-day trips. Durable and adaptable, Knack’s medium backpacks combine function and style in one easy-to-carry design.

Medium Size Backpack Features

  • Expand Your Horizons

    Separate, patented, expandable suitcase compartment makes packing for travel easy by giving you 45% more carrying capacity. Easily access up to 3 changes of clothes with a convenient suitcase lid.

  • Series 2: Large Expandable Knack Pack Backpack Knack

    Protect Your Tech

    Easy-access, padded computer pocket keeps your 15.6” laptop protected during life’s bumpiest moments.

  • Stay Organized

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

Medium Backpacks FAQs

Does the Knack’s organization really make a difference, or is it just for show?

There’s organized, and there’s Knack organized. We’re talking dedicated pockets for tech, hidden water bottle sleeves, and RFID protection for your peace of mind. Smooth, intuitive access means less digging and more doing. So whether you’re conquering a commute or catching a connection, your stuff stays exactly where you want it: primed and ready.
Can I actually use the Knack as a personal item or carry-on for flights?

The answer: yes, and yes. Your Knack Medium Backpack is built to slide under the seat in front of you (when not expanded), giving you first-class access to your essentials mid-flight. Planning a longer haul? Expand it and transform your Knack into the ultimate overhead-companion. Travel hacks included—no stress, all style.
What’s the real-life packing power of the expandable compartment?

Ready for plans that change at the drop of a hat? Your Knack backpack’s expansion game is strong—unzip to unlock up to 35 liters of space, perfect for 2-3 days of outfits, your must-have tech, and those last-minute shoe swaps. Minimalists and maximalists alike, rejoice: finally, a backpack that sees your needs and raises them with room for so much more.
Can the Knack Medium Expandable Backpack really keep up when I need to overpack?

Absolutely. When your day (or your trip) expands, so does your Knack. Effortlessly move from weekday hustle to out-of-office adventures—thanks to our signature expandable compartment. Imagine packing for a long weekend, fitting your laptop, all your essentials, and still having space for those impulsive “just in case” extras. Never settle for a bag that says “maybe”—choose one that says “bring it on.”

Testimonials

I am beyond impressed with this bag! Having owned many bags over the years, this one definitely stands out as the best. What truly sets it apart is the exceptional storage capacity—it’s perfect for both everyday carry and travel. The thoughtful design allows for efficient organization without compromising on style or comfort. The color and feel of the material are fantastic, and I love the durability it offers. It's refreshing to see a New England-based company creating bags tailored for busy leaders who need to pack heavy yet travel light. This bag has exceeded all my expectations, and I couldn’t be happier with my purchase!

Gary M.

My new Knack Pack is simply fantastic. It offers everything I’ve needed in a one-in-all bag for short business trips and day-to-day work trips to the office. Intelligently designed with ample storage space and zippered pouches. High-quality craftsmanship for durability and aesthetics. Could not be happier with my purchase. Highly recommended. Will purchase again as gifts for fellow travelers.

John S.

I don't normally write reviews, but I feel compelled to leave one in this case because I love the Series 2: Medium. I did a lot of research before buying this bag. I finally pulled the trigger in December of 2021, Merry Christmas to me. I work from home, but use the Knack to bring my work stuff to get out of the house and hit the coffee shop or library or whatever. I have also used it for single-bag business travel on short trips and as my general go-to backpack. I have had no complaints and it still looks great over three years later. My MacBook Pro 16" fits in the sleeve perfectly, and the whole thing gives me room for what I need without looking baggy/floppy. The fabric still looks clean, and the zippers are smooth. Would buy again!

Keith P.

Long-time V1 owner. When I finally wore out the bag (which was really just small things like the original rubber zipper pulls, etc.) I ordered another V1. Lo and behold, every little tweak I wanted in the first version was made in the second. The metal zipper pulls, the deeper water bottle and glasses/phone pocket, and the luggage pass-thru make this my perfect bag. And the gray looks really classy. Can’t recommend enough.

Markus

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