"If you’re looking for a bag to replace all bags...this is it."

@stayfoxx

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Best Seller
Series 2: Medium Expandable Knack Pack® Backpack Knack Steel Blue
Series 2: Medium
Steel Blue
$265
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Best Seller
Series 1: Medium Expandable Knack Pack® Backpack Knack Savile Gray
Series 1: Medium
Indigo Blue
$235
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Series 1: Large Expandable Knack Pack® Backpack Knack Stealth Black
Series 1: Large
Stealth Black
$270
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Series 2: Large Expandable Knack Pack Backpack Knack Alloy Gray
Series 2: Large
Alloy Gray
$295
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Series 1: Small Expandable Knack Pack® (Factory Seconds) V2.0 Backpack Knack Savile Gray
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New
Series 2: Small Expandable Knack Pack® Backpack Knack Burnt Orange
Series 2: Small
Midnight Black
$225
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New
Limited Edition Ballistic Knack Pack Backpack Knack Ecru
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New
Business Trip S2 Set Backpack Knack
Business Trip S2 Set
Regular price $358 Sale price $290
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New
S2 Med Gym Set Backpack Knack
S2 Med Gym Set
Alloy Gray
Regular price $321 Sale price $270
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New
Commuter Set Backpack Knack Savile Gray
Commuter Set
Regular price $273 Sale price $245
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Business Trip S1 Set Backpack Knack Savile Gray
Business Trip S1 Set
Regular price $332 Sale price $255
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just added
Gamer Backpack Set Backpack Knack Savile Gray
Knack Up And Go Set
Savile Gray
Regular price $328 Sale price $279
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Overpacker Travel Set Duffel Bags Knack
Overpacker Travel Set
Regular price $426 Sale price $340
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Extended Stay S1 Travel Set Backpack Knack
Extended Stay S1 Travel Set
Stealth Black
Regular price $336 Sale price $285
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Travel Set for Two Backpack Knack Savile Gray
Travel Set for Two
Regular price $470 Sale price $375
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New
Around Town Set Backpack Knack Midnight Black
Around Town Set
Midnight Black
Regular price $263 Sale price $235
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just added
The Travel Set Backpack Knack Indigo Blue
The Travel Set
Indigo Blue
$316
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Medium Expandable Backpack

Large Expandable Backpack

Small Expandable Backpack

New Expandable Backpack

New Expandable Backpack

We want your bag to work for you. That’s why we created our Knack Packs in a few sizes. While each size bag shares many of the same great features, there are a few differences between them which we outline below.

Packing Dimensions
Medium Large
Unexpanded
Medium Knack Backpack Unexpanded 17 Liters
17 Liters
Large Knack Backpack Unexpanded 22 Liters
22 Liters
Expanded
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
Medium Large
Weight Icon
Weight
2 lb 11 oz 3 lb 4 oz
Laptop Icon
Laptop
15" 17"
Plane Overhead Icon
Overhead
All Jets All Jets
Plane Under Seat Icon
Under Seat
All Jets Doesn't fit (when expanded)
Outfits Icon
Outfits
2-3 3-4
Water Bottle Pocket Icon
Water Bottle Pocket
17 oz S'well™ 25 oz S'well™
Tuck-Away Hip Strap Icon
Tuck-Away Hip Strap
No Yes

Size Chart

Model: 5'5"

Knack Backpacks on 5 foot 5 inch model

Medium

Large

Model: 5'11"

Knack Backpacks on 5 foot 11 inch model

Medium

Large

Model: 6'3"

Knack Backpacks on 6 foot 3 inch model

Medium

Large

"Go, explore the unknown. Get lost, find your way back. It’ll change you and the way you experience life."

@_iamduvier

Everday Bag + Expandable Suitcase

"Innovation at its best. "
- Jonathan O..

Laptop Backpack
+
Hidden Carry-on =
One Bag Life

Professional styling for the office

Slim & lightweight for everyday use

Unzip & expand for more space

Separate hidden section for travel

Backpacks Built for One Bag Living

CUSTOM-ENGINEERED STRAPS

When the usual methods failed, we custom-engineered the manufacturing process to attach our top handle and back straps to the backpack. We then filled the bag with over 30 pounds and jerked it up and down more than 3,500 times before we were confident it wouldn’t let you down.

Exhaustively-Tested Zippers

Not only did we test our YKK™ zippers and custom zipper pulls for strength, we also opened and closed them 5,000 times to make sure they would last.

Durable Buckles and Hardware

We crafted our bags using only durable, easy-to-use Duraflex™ Hardware.

Above and Beyond Details

We sweat the little things. Most bags are constructed using 5-6 stitches per inch in the seams. We use 7 stitches per inch. It costs a bit more, but we think the added strength is worth it.

Knack In the News

The best backpack for when you don’t want to look like a backpacker.

Comfortable, durable, versatile, and lots of space.

The versatility of an everyday commuter bag with the convenience of a travel backpack. It’s for the office worker who has an adventurous streak.

It effectively combines a business bag and airline-compliant luggage. If you love traveling light and brilliant design, the Knack Bag is for you.