![Series 2: Large Expandable Knack Pack Backpack Knack Alloy Gray](http://knackbags.com/cdn/shop/files/s2largegrayanglesized.jpg?v=1692411638&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/products/series2-alloylargefront.jpg?v=1692406441&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/grayunexpanded_72537f7a-ce83-4c40-b185-9420d9d72fce.jpg?v=1695885435&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/grayexpanded_370a161f-317b-48ba-a0b7-b0ebed9ea527.jpg?v=1695885449&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/graysuitcase_17eb62b0-0326-473c-9323-0822c0273ebd.jpg?v=1695885478&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/graylaptop_39a95ae7-d01c-4d79-95b6-a7ca01eec7d9.jpg?v=1695885606&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/grayfrontpocket.jpg?v=1695885456&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/graymainpocket_a5ca181d-5075-4116-ab36-9d878d0f6829.jpg?v=1695885524&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/graywaist.jpg?v=1695885480&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/graymodel_898f1d74-42fa-4a79-baec-181e218cf896.jpg?v=1695885528&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack Midnight Black](http://knackbags.com/cdn/shop/files/s2llargeblackanglesized.jpg?v=1695878935&width=3840)
![Midnight Black](http://knackbags.com/cdn/shop/products/Series2-Front.jpg?v=1695878935&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackunexpanded.jpg?v=1695885440&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackexpanded.jpg?v=1695885498&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blacksuitcase.jpg?v=1695885586&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blacklaptop.jpg?v=1695885433&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackfrontpocket.jpg?v=1695885545&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackmainpocket.jpg?v=1695885602&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackwaist.jpg?v=1695885454&width=3840)
![Series 2: Large Expandable Knack Pack Backpack Knack](http://knackbags.com/cdn/shop/files/blackmodel_c01bfc93-70a8-4ec3-a8cb-df0252ee7822.jpg?v=1695885604&width=3840)
Product Details
Dimensions
Volume
Weight
Material
How to live a one bag life - every day
![Stay Connected](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_stay_connected.jpg?v=1715636722)
Stay Connected
Use the Series 2’s padded side computer pocket to always keep your laptop with you. The pocket fits up to 17” laptops (measured diagonally) and its suspended bottom helps keep your computer safely off the floor whenever you put your bag down.
![Stay Connected](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_stay_connected.jpg?v=1715636722)
![Switch it up](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_switch_it_up.jpg?v=1715636722)
Switch it up
Backpack, briefcase or tote? The choice is yours. When you want to change from a backpack, simply unclip the shoulder straps and tuck them away in the zip back panel pocket and voilà!
![Switch it up](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_switch_it_up.jpg?v=1715636722)
![Carry it all](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_carry_it_all.jpg?v=1715636722)
Carry it all
The spacious main compartment is a pocket-lover’s dream with two generously-sized, soft monofilament mesh organization pockets. If that’s not enough, there’s also a protective, fleece-lined tablet pocket and another pocket for your batteries/cables/chargers. Finally, the compartment's lockable zippers keeps everything secure.
![Carry it all](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_carry_it_all.jpg?v=1715636722)
![Organize your day](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_organize_your_day.jpg?v=1715636722)
Organize your day
On-the-go all day? The easy-access front organization compartment helps keep you efficient and productive with its passport/wallet pocket, pen loops, business card pockets and handy removable interior key leash. And you can relax knowing that with lockable zippers and RFID-blocking lining to inhibit malicious RFID chip skimming everything stays safe and sound.
![Organize your day](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_organize_your_day.jpg?v=1715636722)
![Bring your shades](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_bring_your_shades.jpg?v=1715636722)
Bring your shades
The fleece-lined, sunglasses pocket is designed for easy access and protection. And there’s a bonus pocket behind it for other items (phone anyone?) that you need at a minute’s notice.
![Bring your shades](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_bring_your_shades.jpg?v=1715636722)
![Don't look like a hiker](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_hiker.jpg?v=1715636722)
Don't look like a hiker
Only you will know that the sleek, hidden, zip side water bottle pocket holds your 25 oz S'well™/24 oz Hydro Flask™/ 20 oz Knack Insulated bottle
![Don't look like a hiker](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_hiker.jpg?v=1715636722)
![Be discreet](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_discreet.jpg?v=1715636722)
Be discreet
We’d love to tell you the location of the secret zip pocket for valuables, but then it wouldn’t be a secret.
![Be discreet](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_discreet.jpg?v=1715636722)
How to live a one bag life travel
![Expand your horizons](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_expand.jpg?v=1715636722)
Expand your horizons
Our patent-pending, hidden expansion compartment is the secret sauce that makes Series 2 the perfect One Bag Life backpack. Simply unzip and expand the compartment to get over 45% more carrying capacity. Unexpanded: 30 Liters. Expanded: 46 Liters.
![Expand your horizons](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_expand.jpg?v=1715636722)
![Pack it in](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_pack_it_in.jpg?v=1715636722)
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: 16 Liters.
![Pack it in](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_pack_it_in.jpg?v=1715636722)
![Lock on](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_lock_on.jpg?v=1715636722)
Lock on
Keep everything secure during your journeys with lockable zippers on the hidden suitcase and the main compartment. (Lock not included)
![Lock on](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_lock_on.jpg?v=1715636722)
![Be compatible](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_compatible.jpg?v=1715636722)
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.
![Be compatible](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_compatible.jpg?v=1715636722)
![Lighten your load](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_lighten_load.jpg?v=1715636722)
Lighten your load
Carrying the weight of the world in your Knack Pack? We hear you. Our padded, removable waist strap transfers the load from your back to your hips to make your journey more comfortable.
![Lighten your load](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_lighten_load.jpg?v=1715636722)
![Stay flexible](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_flexible.jpg?v=1715636722)
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.
![Stay flexible](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_flexible.jpg?v=1715636722)
![Keep dry](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_dry.jpg?v=1715636722)
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.
![Keep dry](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_dry.jpg?v=1715636722)
![Smell like a rose](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_rose.jpg?v=1715636722)
Smell like a rose
Our custom-designed lining has a special antimicrobial treatment that helps to keep your Knack Pack fresh even when it’s filled with dirty or sweaty clothes.
![Smell like a rose](https://cdn.shopify.com/s/files/1/0023/8767/3149/files/S2L_rose.jpg?v=1715636722)