Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.
Medium Knack Pack. Clean design with organization pockets.
Medium Knack Pack. Unexpanded for day use.
Side view, unexpanded for day use. 17 liters unexpanded.
Side view, expanded for travel use. 31 liters expanded.
Ergonomically-designed comfort foam shoulder straps with easy-release clips and adjustable, removable sternum strap.
Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes.
Trolley sleeve for longer trips.
Medium Knack Pack unexpanded and expanded on 5'10" model.

Medium Expandable Knack Pack®

Regular price $195.00

The Medium Expandable Knack Pack is our most popular bag. Unexpanded, it is perfect for every day, around-town carrying. Ready to travel? Expand the hidden suitcase compartment and pack what you need for a 2-3 day trip. Learn More


767 left in stock

 
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Dimensions
Small Medium Large
Front
Small Knack Backpack Unexpanded 16 Liters
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Medium Knack Backpack Unexpanded 17 Liters
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Large Knack Backpack Unexpanded 22 Liters
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Side Unexpanded
Small Knack Backpack Expanded 31 Liters
16 Liters
Medium Knack Backpack Expanded 31 Liters
17 Liters
Large Knack Backpack Expanded 37 Liters
22 Liters
Side Expanded
Small Knack Backpack Expanded 29 Liters
16 L + 13 L = 29 Liters
Medium Knack Backpack Expanded 31 Liters
17 L + 14 L = 31 Liters
Large Knack Backpack Expanded 37 Liters
22 L + 15 L = 37 Liters
Additional Specs
Small Medium Large
Weight Icon
Weight
2 lb 4 oz Fabric:
2 lb 11 oz
Leather:
3 lb 9 oz
3 lb 4 oz
Laptop Icon
Laptop
13" 15" 17"
Plane Overhead Icon
Overhead
All Jets All Jets All Jets
Plane Under Seat Icon
Under Seat
All Jets All Jets All Jets (when unexpanded)
Outfits Icon
Outfits
1-2 2-3 3-4
Trolley Sleeve
Trolley Sleeve
Yes Yes Yes
Water Bottle Pocket Icon
Water Bottle Pocket
17 oz S'well™/18 oz Hydro Flask™ 17 oz S'well™/24 oz Hydro Flask™ 25 oz S'well™/24 oz Hydro Flask™

Size Chart

Model: 5'3"

Knack Backpacks on 5 foot 3 inch model

Small

Medium

Large

Model: 5'10"

Knack Backpacks on 5 foot 10 inch model

Small

Medium

Large

Model: 6'3"

Knack Backpacks on 6 foot 3 inch model

Small

Medium

Large

Laptop

Fits 15" Laptop

Overhead

All Jets

Under Seat

All Jets

Outfits

2-3

Not sure what size you need? See comparison and size chart

KEY FEATURES

Key Everyday Features

  • Easy-access, padded side-zip computer pocket for 15" laptops
  • Spacious main compartment with organization pockets, fleece-lined tablet pocket and removable key leash
  • Hidden, zip-away side water bottle pocket

Key Travel Features

  • Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes
  • Meets most popular carry-on requirements as well as fits under most seats
  • Packing compartment with easy-access suitcase lid
  • Hidden trolley sleeve slips over wheeled luggage handles

Key Technical Features

  • Custom-developed, durable, water-resistant body fabric 
  • Molded, comfort-cool foam back panel
  • YKK™ water-resistant zipper with custom-designed pullers

CORPORATE SALES

For orders over 10 units or for Knack Products with custom corporate logos, please contact: corporate@knackbags.com.

MAXIMIZE SPACE WITH KNACK ACCESSORIES

CUBE BUNDLE

$45

LARGE CUBE

$25

INSULATED BOTTLE

$25

PRODUCT DETAILS

Pack Dimensions (LxWxD):

Unexpanded: 19" x 12" x 4.5"

Expanded: 19" x 12" x 9.5"

Volume:

Unexpanded: 17 Liters

Expanded: 31 Liters

Weight: 2 pounds 11 ounces (Just a bit more than 2 Grande Coffees)

Laptop Pocket Dimensions (LxWxD):

Pocket Opening: 15"

Dimensions: 15.5" x 11" x 2" (fits 15” laptop)

Fabric: Suiting-inspired, custom-developed, water-resistant 1200 denier two tone polyester body fabric. Tested to carry loads up to 40 pounds.


Lining Fabric: Custom, stain-resistant, antimicrobial 150D Nylon fabric lining


Zippers: Water-resistant YKK™ reverse coil zippers


Zipper Pullers: Strong, custom-designed cast zinc zipper pullers with comfortable PU overmold and chip-resistant PVD coating


Hardware: Duraflex™ buckles and sliders


Back Panel Material: Molded, comfort-cool foam back panel

Everyday Features:

  • Spacious main compartment with lockable zippers
  • Protective, fleece-lined internal tablet pocket
  • 2 interior, see-through, soft monofilament mesh zip organization pockets
  • Handy removable interior key leash
  • Built-in, fleece-lined, protective soft case sunglasses pocket
  • Easy-access, front triangle pocket with RFID-blocking lining, business card pockets and passport pocket
  • Exterior charger and battery pocket with pen loops
  • Large zip-away side water bottle pocket holds 17 ounce S'well™/24 ounce Hydro Flask™ bottles
  • Padded, side computer pocket fits up to 15" laptops (measured diagonally)
  • Comfort-foam top carry handle
  • Ergonomically-designed comfort foam shoulder straps with easy-release clips
  • Elastic keepers for shoulder strap
  • Adjustable, removable sternum strap helps make heavier loads more comfortable

Travel Features:

  • Separate, patent-pending, expandable 14 cubic liter packing compartment with easy-access suitcase lid opening
  • Hidden trolley sleeve slips over wheeled luggage handles
  • Lockable zippers on travel compartment
  • Internal packing compression system
  • Large, see-through, soft monofilament mesh zip packing pocket
  • Rain flap covering expansion zipper
  • Tuck-away back storage pocket for shoulder straps

HOW TO LIVE A ONE BAG LIFE - EVERY DAY

STAY CONNECTED

Use the Knack Pack’s padded side computer pocket to always keep your laptop with you. The pocket fits 15” laptops (measured diagonally) and its false bottom helps keep your computer safely off the floor whenever you put your bag down.

ORGANIZE THOSE CORDS

The easy access charger and battery pocket helps keep all those cords, chargers, adapters, batteries and USB sticks that you can’t live without in one neat place instead of rolling around in the bottom of your bag.

BRING YOUR SHADES

The fleece-lined, soft case sunglasses pocket is designed for easy access and protection. And there’s a bonus pocket behind it for other items you need at a minute’s notice.

HOLD THE CARDS

Feel free to throw in a bunch of business cards - there’s plenty of room in the organizer panel. Also, rest assured that your passport and wallet are safe. Our RFID blocking fabric protects your RFID chip cards from unwanted skimming.

STAY ON KEY

Our removable, easy-access key leash makes it a breeze to bring your keys with you everywhere.

CARRY IT ALL

The Knack Pack’s main compartment has two generously-sized, soft monofilament mesh, zip organization pockets. Our special mesh makes it easy to always see all the things you stuff into the pockets. If that’s not enough, there’s a protective fleece-lined pocket to keep your tablet safe and sound. Main compartment is 17 liters.

DON’T LOOK LIKE A HIKER

Only you will know that the sleek, hidden, zip-away side water bottle pocket holds your 17oz S'well® or 24 oz Hydro Flask® water bottle.

HOW TO LIVE A ONE BAG LIFE - TRAVEL

EXPAND YOUR HORIZONS

Our patent-pending, hidden expansion compartment is the secret sauce that makes Knack the perfect One Bag Life backpack. Simply unzip and expand the compartment to get over 80% more carrying capacity. Unexpanded: 17 Liters. Expanded: 31 Liters.

PACK IT IN

Not sure about staying in town after your business trip ends? Pack our patent-pending, hidden suitcase compartment with a change of clothes and live spontaneously Packing capacity: 14 Liters.

LOCK ON

Keep everything secure during your journeys with lockable zippers on the hidden suitcase and the main compartment. (Lock not included)

BE COMPATIBLE

Sometimes, your trips require a big piece of wheeled luggage. Don’t worry, it’s easy to bring your Knack Pack along too. Our hidden trolley sleeve lets you slip your Knack over the handle of almost all sizes of wheeled luggage.

STAY FLEXIBLE

Our adjustable sternum strap does a great job of distributing weight when you’ve really packed your Knack. But if you prefer a cleaner look, the strap unhooks for easy removal.

BE PREPARED

It should never happen, but if that flight attendant makes you check your backpack, don’t worry about your straps getting caught on the luggage carousel. Simply unclip your straps and stow them out of the way in the back panel pocket.

KEEP DRY

While we don’t recommend swimming with your Knack Pack, our specially coated fabric and reverse coil zippers help keep your belongings dry in all types of weather.

SMELL LIKE A ROSE

Our custom-designed lining brightens up your day and ensures things never get lost in your bag. And our special antimicrobial treatment helps to keep everything fresh even when you’ve packed dirty or sweaty clothes.

LOOK SHARP

Inspired by tailored clothing fabrics, Knack’s custom-designed, two-tone fabric is both lightweight and durable.

Customer Reviews

Based on 121 reviews
84%
(102)
13%
(16)
2%
(3)
0%
(0)
0%
(0)
A
A.H.
Best bag ever

I am a medical professional who is also in the military and enjoys traveling. I really like that this bag is appropriate in all settings and I don't have to add or remove items because of organization and space. I wish I would have gotten this sooner!

T
T.C.
Best Ever!

My company purchased this backpack for me while going on an African safari. It was amazing how every inch of this backpack was thought through. Very efficient, well planned, organized, but best of all...it holds A LOT!! I was pleasantly surprised by how much it held. Best travel backpack ever!! 🎒 💕

D
D.A.
Best pack I've ever had!

Love the pack, great features, great quality, great compartments, great zippers. A friend had gotten 1.0 and I was waiting for 2.0 to become available to get my own. Great buy. The suitcase handle pass-through is an important feature to me. When the pack is really full it's tough to feed the suitcase handle through that slot. I probably had the pack way too full, but maybe something to look at as you continue to make this awesome pack even better!

B
B.L.
Wish I had gone bigger

A great bag, but I wish I had gone with the Large instead of the Medium. Despite the dimensions being nearly identical to the duffel I planned to replace, the layout of the Knack Pack doesn't allow for the same quantity of items.

Overall my only complaints are that it's deceptively smaller than I had imagined and that the laptop compartment could be better padded at the bottom to prevent bumps when setting it down. Beyond that, it's thoughtfully designed, well-constructed, and comfortable to carry all day.

Hi Benjamin, Just wanted to let you know our Knack 2.0's have false bottoms in their laptop compartments, protecting our customers laptops from drops, bumps and whoopsies. Glad to hear our Knack Pack is working so well for you. Knack Customer Service
T
T.L.
Great travel bag

Just used this for our last holiday trip. It has a ton of pockets in all the right places and is solidly built. Everything is well protected and this bag is thoughtfully designed. Thank you!

T
T.
gift for frequent traveler

I bought this for my dad for Christmas after he did all of the research and decided which bag he wanted. He traveled with it the next day and absolutely loves it. I tried it out and can attest to the excellent build quality and overall functionality. I would definitely recommend this bag to anyone looking for a competent daily carry or a flexible bag for multi-day trips.

A
A.M.

I ordered this backpack for my husband's Christmas gift at the end of November. Today is December 31 and I have not received it yet.

Hi Anne,
We sent an email to you on 12/29/19 at 8:15 pm EST. It may have gone to your junk email, but we were checking to see if you received your Knack Pack or not. If not we were going to have the warehouse send one to you by two day air. If you can't find the email, please email us at support@knackbags.com.
The usual delivery time for free shipping to Hawaii is estimated at 14 business days, however it looks like USPS has had an issue with this shipment. For future orders, we do offer 2 day shipping for a $30 surcharge if timing is an issue.
Sincerely,
Knack Customer Service

K
K.
Great gift

I gave this as a gift to my brother who often has weekend getaways and also has 2 kids. He really loved it! It's going to be perfect for him. He had never heard of Knack, but he was very impressed with all the pockets, storage, and the expandable suitcase portion.

D
D.M.
Christmas Gift

Our son was pleasantly surprised to receive a Knack Bag. He liked the color (inside and out) and the versatility of the bag. A special thank you to Rachel who took my order!

E
E.
Great Bag!

its attractive, has lots of handy pockets and compartments, and is very thoughtfully made!

Customer Reviews

Based on 121 reviews
84%
(102)
13%
(16)
2%
(3)
0%
(0)
0%
(0)
A
A.H.
Best bag ever

I am a medical professional who is also in the military and enjoys traveling. I really like that this bag is appropriate in all settings and I don't have to add or remove items because of organization and space. I wish I would have gotten this sooner!

T
T.C.
Best Ever!

My company purchased this backpack for me while going on an African safari. It was amazing how every inch of this backpack was thought through. Very efficient, well planned, organized, but best of all...it holds A LOT!! I was pleasantly surprised by how much it held. Best travel backpack ever!! 🎒 💕

D
D.A.
Best pack I've ever had!

Love the pack, great features, great quality, great compartments, great zippers. A friend had gotten 1.0 and I was waiting for 2.0 to become available to get my own. Great buy. The suitcase handle pass-through is an important feature to me. When the pack is really full it's tough to feed the suitcase handle through that slot. I probably had the pack way too full, but maybe something to look at as you continue to make this awesome pack even better!

B
B.L.
Wish I had gone bigger

A great bag, but I wish I had gone with the Large instead of the Medium. Despite the dimensions being nearly identical to the duffel I planned to replace, the layout of the Knack Pack doesn't allow for the same quantity of items.

Overall my only complaints are that it's deceptively smaller than I had imagined and that the laptop compartment could be better padded at the bottom to prevent bumps when setting it down. Beyond that, it's thoughtfully designed, well-constructed, and comfortable to carry all day.

Hi Benjamin, Just wanted to let you know our Knack 2.0's have false bottoms in their laptop compartments, protecting our customers laptops from drops, bumps and whoopsies. Glad to hear our Knack Pack is working so well for you. Knack Customer Service
T
T.L.
Great travel bag

Just used this for our last holiday trip. It has a ton of pockets in all the right places and is solidly built. Everything is well protected and this bag is thoughtfully designed. Thank you!

T
T.
gift for frequent traveler

I bought this for my dad for Christmas after he did all of the research and decided which bag he wanted. He traveled with it the next day and absolutely loves it. I tried it out and can attest to the excellent build quality and overall functionality. I would definitely recommend this bag to anyone looking for a competent daily carry or a flexible bag for multi-day trips.

A
A.M.

I ordered this backpack for my husband's Christmas gift at the end of November. Today is December 31 and I have not received it yet.

Hi Anne,
We sent an email to you on 12/29/19 at 8:15 pm EST. It may have gone to your junk email, but we were checking to see if you received your Knack Pack or not. If not we were going to have the warehouse send one to you by two day air. If you can't find the email, please email us at support@knackbags.com.
The usual delivery time for free shipping to Hawaii is estimated at 14 business days, however it looks like USPS has had an issue with this shipment. For future orders, we do offer 2 day shipping for a $30 surcharge if timing is an issue.
Sincerely,
Knack Customer Service

K
K.
Great gift

I gave this as a gift to my brother who often has weekend getaways and also has 2 kids. He really loved it! It's going to be perfect for him. He had never heard of Knack, but he was very impressed with all the pockets, storage, and the expandable suitcase portion.

D
D.M.
Christmas Gift

Our son was pleasantly surprised to receive a Knack Bag. He liked the color (inside and out) and the versatility of the bag. A special thank you to Rachel who took my order!

E
E.
Great Bag!

its attractive, has lots of handy pockets and compartments, and is very thoughtfully made!

Living a One Bag Life