A Brain Bag in Nebulous Grey (grey) Ballistic. The Brain Bag in Nebulous Grey Ballistic with a Cobalt 210 Cerylon interior. The Brain Bag in Nebulous Grey (dark grey) 525 Ballistic with the front main compartment zipper opened to reveal its Cloud (light grey) 210 Ballistic interior. A Brain Bag in Mars Red (red) 525 Ballistic. The Brain Bag in Mars Red 525 Ballistic with the front main compartment zipper opened to reveal its Cloud (light grey) 210 Ballistic interior. A Brain Bag in Black Ballistic. The Brain Bag in Black Ballistic with the front main compartment zipper opened to reveal its Cobalt (blue with light blue grid) 210 Cerylon interior. A Brain Bag in Black Ballistic. The Brain Bag in Nebulous Grey (dark grey) Ballistic with the front main compartment zipper opened to reveal its Mountain Grey (grey with light grey grid) 210 Cerylon interior. A Brain Bag in Cloud (light grey) 525 Ballistic. A Brain Bag in Deep Blue (dark blue) Ballistic. The Brain Bag in Deep Blue (dark blue) 525 Ballistic with the front main compartment zipper opened to reveal its Mountain Grey (grey with light grey grid) 210 Cerylon interior. The Brain Bag in Cloud (light grey) 525 Ballistic with the front main compartment zipper opened to reveal its Cobalt (blue with light blue grid) 210 Cerylon interior. The Brain Bag in Cloud (light grey) 525 Ballistic with the front main compartment zipper opened to reveal its Dawn (blue-grey) 210 Ballistic interior.\ A Brain Bag in Aubergine (dark purple) Ballistic. A Brain Bag in Aubergine Ballistic with a Mountain Grey 210 Cerylon interior. A Brain Bag in Burnt Orange Ballistic. The Brain Bag in Burnt Orange Ballistic with the front main compartment zipper opened to reveal its Mountain Grey (grey with light grey grid) 210 Cerylon interior. The Brain Bag in Deep Blue (dark blue) 525 Ballistic with the front main compartment zipper opened to reveal its Dawn (blue-grey) 210 Ballistic interior. The Brain Bag in Deep Blue (dark blue) 630 Ballistic with the front main compartment zipper opened to reveal its Moss (green with light green grid) 210 Cerylon interior. The Brain Bag in Deep Blue (dark blue) 525 Ballistic with the front main compartment zipper opened to reveal its Moss (green with light green grid) 210 Cerylon interior. A Brain Bag in Coyote (light brown) Ballistic. The Brain Bag in Coyote (light brown) Ballistic with the front main compartment zipper opened to reveal its Mountain Grey (grey with light grey grid) 210 Cerylon interior. A Brain Bag in Wilderness (forest green) Ballistic. The Brain Bag in Wilderness (forest green) Ballistic with the front main compartment zipper opened to reveal its Cloud (grey with light grey interior) 210 Cerylon interior. A Brain Bag in Constellation (light blue) 525 Ballistic. A profile shot of the Brain Bag in Constellation (light blue) 525 Ballistic. The Brain Bag in Constellation (light blue) 525 Ballistic with the front main compartment zipper opened to reveal its Cloud (light grey) 210 Ballistic interior. A Brain Bag in Ursa (greyish-brown) Ballistic. The Brain Bag in Ursa (brown-grey) Ballistic with the front main compartment zipper opened to reveal its Cobalt (blue with light blue grid) 210 Cerylon interior. The Brain Bag in Ursa (brown-grey) Ballistic with the front main compartment zipper opened to reveal its Mountain (grey with light grey grid) 210 Cerylon interior. A profile shot of the Brain Bag in Ursa (greyish-brown) 525 Ballistic.
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$240.00


Color: Wilderness Ballistic/Mountain Grey 210 Cerylon

In Stock

Available Color options

A serious backpack that can fit two (or more) laptops.

36 liters / 2200 cu. in.

Add a Cache
$51.00 - 10A (10.5" 2021 iPad/ iPad Air/Pro)
visible variant TB03310A TB03310B TB03311A TB03312A TB03313A TB03313B TB03313C TB03313D TB03313E TB03315A TB03315B TB03315C TB03315D TB03316A TB03317B^^A Cache on the Horizontal side.

TLDR

If you need a large backpack for everyday carry, the Brain Bag is the one for you. You'll be blown away by not only its size, but also its utility, versatility, and longevity.

Full Description

The Brain Bag debuted in 1996 and its design has stood the test of time. The ultimate on-your-back student or business organizer, the Brain Bag is our Slant-6 of backpacks: it will surprise you with its utility, versatility, and longevity. Long after lesser bags have frayed their seams, blown their zippers, and popped their straps, the Brain Bag will continue to be your faithful companion.

Two Main Compartments

In both of the main compartments (on the back panel of each) are two unobtrusive webbing loops (that we call "rail loops") to which you can secure the optional Cache. Many of us will appreciate this functionality on a daily basis: the rail system can be a convenient and quick way to remove one's laptop from the bag.

Three External Pockets

On the front of the Brain Bag are four external pockets. The small top pocket is perfect for a wallet and cell phone and has an inside snaphooks for keys. The two vertical pockets are large enough for water bottles or even a small thermos; inside both of these pockets are pen/pencil organizers. The left pocket has an outside flat mesh pocket for brochures, plane tickets, or even a small U-lock bike lock. Between the pockets are two lash straps for an umbrella or a raincoat, and above these straps is a heavy-duty snaphook so you can attach a water bottle, coffee mug, or what-have-you.

Side Compression Straps

Side compression straps compress the Brain Bag when it is not full and stabilize the load; you can also tuck a raincoat, hoodie, or yoga mat under these straps.

Breathable Back Panel

The back is made of Spacer mesh and is padded with 3/8", high quality, closed-cell foam. This combination of mesh and smooth nylon is designed to provide maximum breathability while still being gentle on your clothing. 

Edgeless Shoulder Straps

Conformity is overrated — except, perhaps, when it comes to shoulder straps. The edgelessness of the Brain Bag shoulder straps allows them to more softly conform to your shoulder — we find that this increases comfort. Yet the straps aren't too soft: the 1/2" thick EVAZOTE® OEKO-TEX® certified foam means the strap is robust enough to carry a heavy load.

What's Included?

1x 8-inch Black Webbing Snaphook/Snaphook Key Strap

A Key Strap is a strip of webbing with plastic snaphooks on the end. The 8” Key Strap in Black that’s included in most of our larger bags is, for many, the gateway to a world of organization via Key Straps and Organizer Pouches. All the members of the Key Strap family are intended to make locating things in your bag easier and more instinctive. Pulling out a small item or pouch tethered to a strap is easier than rooting around aimlessly in the depths of your pack; you can also rest assured that anything hooked to a strap is much less likely to fall out or otherwise be left behind. You can find more Key Strap colors and varieties on the Key Strap page.


A Set of Black Zipper Pulls

Some folks prefer metal zipper pulls. Others prefer cord pulls. So, what to do about that? We think the best solution (in most cases) is to offer metal pulls and include a starter pack of Cord Pulls with most bags.

1x Sternum Strap Assembly

An adjustable and removable sternum strap with leave-no-trace hardware: if you don't like or don't use your sternum strap, remove it and leave (almost) nothing behind.

1x Gatekeeper Waist Strap

A simple webbing waist strap that can offer extra stability when running to catch a bus, plane, or train. It can also add a small measure of support for a heavy load (for a truly supportive hip belt experience, please see the optional 1.5" Padded Hip Belt.) Also features leave-no-trace hardware.

What's Optional?

1.5" Padded Hip Belt 

The 1.5" Padded Hip Belt allows you to carry some of the weight of a loaded pack on your hips rather than just your shoulders.

Cache

Want to carry one (or two!) laptops? Get the Cache sized for your device and use the loops at the top of each main compartment to attach your Cache when you need it and remove it when you don't.

In both of the main compartments (on the back panel of each) are two unobtrusive webbing loops (that we call "rail loops") to which you can secure the optional Cache. Many of us will appreciate this functionality on a daily basis: the rail system can be a convenient and quick way to remove one's laptop from the bag.

On the front of the Brain Bag are four external pockets. The small top pocket is perfect for a wallet and cell phone and has an inside snaphooks for keys. The two vertical pockets are large enough for water bottles or even a small thermos; inside both of these pockets are pen/pencil organizers. The left pocket has an outside flat mesh pocket for brochures, plane tickets, or even a small U-lock bike lock. Between the pockets are two lash straps for an umbrella or a raincoat, and above these straps is a heavy-duty snaphook so you can attach a water bottle, coffee mug, or what-have-you.

Side compression straps compress the Brain Bag when it is not full and stabilize the load; you can also tuck a raincoat, hoodie, or yoga mat under these straps.

The back is made of Spacer mesh and is padded with 3/8", high quality, closed-cell foam. This combination of mesh and smooth nylon is designed to provide maximum breathability while still being gentle on your clothing. 

Conformity is overrated — except, perhaps, when it comes to shoulder straps. The edgelessness of the Brain Bag shoulder straps allows them to more softly conform to your shoulder — we find that this increases comfort. Yet the straps aren't too soft: the 1/2" thick EVAZOTE® OEKO-TEX® certified foam means the strap is robust enough to carry a heavy load.

1x 8-inch Black Webbing Snaphook/Snaphook Key Strap

A Key Strap is a strip of webbing with plastic snaphooks on the end. The 8” Key Strap in Black that’s included in most of our larger bags is, for many, the gateway to a world of organization via Key Straps and Organizer Pouches. All the members of the Key Strap family are intended to make locating things in your bag easier and more instinctive. Pulling out a small item or pouch tethered to a strap is easier than rooting around aimlessly in the depths of your pack; you can also rest assured that anything hooked to a strap is much less likely to fall out or otherwise be left behind. You can find more Key Strap colors and varieties on the Key Strap page.


A Set of Black Zipper Pulls

Some folks prefer metal zipper pulls. Others prefer cord pulls. So, what to do about that? We think the best solution (in most cases) is to offer metal pulls and include a starter pack of Cord Pulls with most bags.

1x Sternum Strap Assembly

An adjustable and removable sternum strap with leave-no-trace hardware: if you don't like or don't use your sternum strap, remove it and leave (almost) nothing behind.

1x Gatekeeper Waist Strap

A simple webbing waist strap that can offer extra stability when running to catch a bus, plane, or train. It can also add a small measure of support for a heavy load (for a truly supportive hip belt experience, please see the optional 1.5" Padded Hip Belt.) Also features leave-no-trace hardware.

1.5" Padded Hip Belt 

The 1.5" Padded Hip Belt allows you to carry some of the weight of a loaded pack on your hips rather than just your shoulders.

Cache

Want to carry one (or two!) laptops? Get the Cache sized for your device and use the loops at the top of each main compartment to attach your Cache when you need it and remove it when you don't.

Materials

Back

Spacer Mesh back

Straps

Edgeless EV50 1/2" / 12mm shoulder straps (EVAZOTE® OEKO-TEX® foam)

Grab Handle

PORON® foam handle

Components

Duraflex®, Nexus, and Woojin buckles and related components

Zippers

#10 YKK coil zippers on main compartments
#8 YKK coil zippers on pockets

Specs

Dimensions

14" (w) x 18.1" (h) x 9.1" (d) / 355 (w) x 460 (h) x 230 (d) mm

Weight

Ballistic Nylon: 2 lb 13.5 oz / 1290 grams

Volume

36 liters / 2200 cu. in. (ASTM Standard Measure)

Straps

.5" / 12 mm padded and contoured shoulder straps with .75" / 20 mm removable sternum strap

Total O-Rings

9

(3 in the back main compartment
3 in the front main compartment
1 in the top small pocket
1 in left side pocket
1 in right side pocket)

4.9
Rated 4.9 out of 5 stars
Based on 124 reviews
94%would recommend this product
124 reviews
  • Joe B.
    Verified Reviewer
    Bought For Myself
    1 month ago
    Bought For Myself
    Rated 5 out of 5 stars
    Buy It For Life!

    I bought my Brain Bag in 2006. Since then it has been a constant companion. Most days I carry 2 laptops and all stuff a guy carrying 2 laptops might need. Ive commuted to work, traveled by car and plane all throughout the country. In all my Tom Bihn bag has been well over a million miles with me. Most days it easily weighs 20+ pounds.

    Somehow it has held up without fail regardless of my neglect and abuse of it. Its big but it compresses down really nice.

    If you need a bag like no other get a tom bihn.

  • Matthew M.
    Verified Buyer
    Bought For Myself
    Product Standouts Comfortable, High Quality Craftsmanship, Sewn in USA, Good Storage Size, Durable
    5 months ago
    Bought For Myself
    Product Standouts Comfortable, High Quality Craftsmanship, Sewn in USA, Good Storage Size, Durable
    Rated 5 out of 5 stars
    Best Big Backpack of All Time

    If you need a large EDC backpack there is really nothing that compares. I wasted time trying several very popular bags before finally ordering the brain bag. I usually carry multiple laptops, books, jackets, sweaters and I always have room to spare. The compression straps keep it from feeling too bulky - wish I would have gotten one of these years ago.

  • Jamie M.
    Verified Buyer
    Bought For Myself
    Product Standouts Comfortable, High Quality Craftsmanship, Thoughtful Design, Durable
    1 year ago
    Bought For Myself
    Product Standouts Comfortable, High Quality Craftsmanship, Thoughtful Design, Durable
    Rated 5 out of 5 stars
    Awesome Daily Bag

    I bought the brain bag as my first Tom Bihn bag and it's been great. I often carry two laptops (a personal 16 inch gaming and a larger work laptop) and the weight wore out my last bag. This bag works perfectly by having two main compartments, strong zippers, and ergonomic shoulder straps. Even with two massive laptops the bag is comfortable.

    The biggest selling points to me are:

    1. Quality 10/10

    2. Black in color (a requirement for work use)

    3. Doesn't look tactical (most strong backpacks try to be tactical which I wasn't looking for)

    4. Heavy duty

    5. Little hook points in pockets

    The outer pockets are different than most other bags and have taken some time to get used to but they work great. It's a well thought out bag and I couldn't be happier.

    It is a very functional bag however if you're looking for a backpack to just stuff, stuff into I would consider a different one. This bag great for books or documents or laptops with two divided spaces that fit that size stuff; it kinda barber sense why it's called a brain bag!

    I bought a Freudian slip also and it's been nice for organizing things. I will say no papers get lost in my bag anymore. I recommend buying some strap holders, I wish I ordered some with the bag. I'll probably buy some soon.

  • Randall S.
    Verified Reviewer
    Bought For Myself
    Product Standouts High Quality Craftsmanship, High Quality Finishings, Sewn in USA, Durable, Easily Adjustable
    1 year ago
    Bought For Myself
    Product Standouts High Quality Craftsmanship, High Quality Finishings, Sewn in USA, Durable, Easily Adjustable
    Rated 5 out of 5 stars
    So I got my brain bag back in 2011 and....

    So, I got my brain bag back in 2011, used it for 4 years straight as as traveling consultant carrying 2 laptops at a time as well as plenty of other items over 2 to 4;air segments a week (200 to 400 segments a years) in the air and now in 2023 it's basically like new. While I don't travel like I used to, it is now the perfect backpack to rock when I'm riding my Harley. I've spent 200+ on groceries and managed to sling was many as 9 double and triple plastic bagged items to the outside using clevis hooks and the squeezing straps as mount points. Literally, any other backpack would have disintegrated long ago.

    This thing is literally awesome.

    Photos attached show my typical load when I was a traveling consultant. The pic on the Harley is the same bag but in 2020. I'went to Home Depot and on the way home, I had secured that US flag to my back with the backpack holding it between it and my back. Worked great for driving 50 mph up Columbia Blvd in Philly to get home.

  • Wes O.
    Verified Buyer
    Bought For Myself
    Product Standouts Thoughtful Design, Sewn in USA, High Quality Craftsmanship, Comfortable
    1 year ago
    Bought For Myself
    Product Standouts Thoughtful Design, Sewn in USA, High Quality Craftsmanship, Comfortable
    Rated 5 out of 5 stars
    I have found the perfect bag.

    The Brain Bag for me is the perfect amount of organization and cavernous bag. A cavernous bag that I can cinch up when Im not carrying a hole lot and let out when I need to take the house with me, I have loved Tom Bihn for years and I love the organizational options and ideas but i needed my everyday bag to be more of a dump stuff in and go with a little bit of space to get Bihn geeky. This bag hits just right for me.

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Lifetime guarantee image

Sewn in Seattle

Our bags are designed and sewn right here in Seattle, Washington, U.S.A.

That allows us to be control freaks in the best way possible; we have direct control and oversight of the quality of our materials, our products, and the jobs and working environment that we help create. It also offers us a unique spontaneity: when we have an idea for a new product or accessory, we can design it, figure out how to build it, add it to our website and be ready to ship it out our front door all within just a few weeks. How cool is that?

Intrigued? You can find out more about the unusual way we do business on our Company Philosophy page.

THE BIHN Guarantee

Everything you buy from us here at TOM BIHN is satisfaction guaranteed. We’ve been in business since 1972 and we stand behind what we make.

If something goes wrong and it's our fault, we'll fix it for free. Repairs due to normal wear and tear or due to other things that are not our fault will be performed, when possible, at a reasonable charge right here in our Seattle factory where your bag was made. Defects in materials or workmanship are uncommon and almost always evident while the product is still new. Keep in mind that bags and packs are often subject to extreme wear in everyday use: do not expect them to last forever. Only true love lasts forever! You can expect a TOM BIHN product to give years and years of hard service.

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