• visible variant TB0114-GKOL TB0114-GKGL TB0114-GKIJ TB0104-GKLJ TB0114-GKLJ^^A Brain Bag in Nebulous Grey (grey) Ballistic.
  • visible variant TB0114-GKOL^^The Brain Bag in Nebulous Grey Ballistic with a Cobalt 210 Cerylon interior.
  • visible variant TB0104-GKLJ TB0114-GKLJ^^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.
  • Brain Bag
  • visible variant TB0104-MKLJ TB0114-MKLJ^^A Brain Bag in Mars Red (red) 525 Ballistic.
  • visible variant TB0104-MKLJ TB0114-MKLJ^^The Brain Bag in Mars Red 525 Ballistic with the front main compartment zipper opened to reveal its Cloud (light grey) 210 Ballistic interior.
  • visible variant TB0114-BKOL TB0114-BKPL^^A Brain Bag in Black Ballistic.
  • visible variant TB0114-BKOL^^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.
  • visible variant TB0114-BKPL^^The Brain Bag in Black Ballistic with the front main compartment zipper opened to reveal its Persimmon (dark orange with light orange grid) 210 Cerylon interior.
  • visible variant TB0114-BKGL^^A Brain Bag in Black Ballistic.
  • visible variant TB0114-BKGL^^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.
  • visible variant TB0104-LKDJ TB0114-LKDJ^^A Brain Bag in Cloud (light grey) 525 Ballistic.
  • visible variant TB0114-DKDL TB0114-DKGL TB0114-DKML^^A Brain Bag in Deep Blue (dark blue) Ballistic.
  • visible variant TB0114-DKDL^^The Brain Bag in Deep Blue (dark blue) 525 Ballistic with the front main compartment zipper opened to reveal its Dusk (purplish-blue with light purplish-blue grid) 210 Cerylon interior.
  • visible variant TB0114-DKGL^^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.
  • visible variant TB0104-LKDJ TB0114-LKDJ^^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.\
  • visible variant TB0114-UKDL TB0114-UKGL TB0114-UKOL TB0114-UKIJ^^A Brain Bag in Aubergine (dark purple) Ballistic.
  • visible variant TB0114-UKGL^^A Brain Bag in Aubergine Ballistic with a Mountain Grey 210 Cerylon interior.
  • visible variant TB0114-UKDL^^A Brain Bag in Aubergine Ballistic with a Dusk (dark purple with purple grid) 210 Cerylon interior.
  • visible variant TB0104-TKLJ TB0114-TKLJ TB0114-TKGL TB0114-TKDL^^A Brain Bag in Burnt Orange Ballistic.
  • visible variant TB0114-TKGL^^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.
  • visible variant TB0104-DKDJ TB0114-DKDJ^^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.
  • visible variant TB0114-DKDL^^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.
  • visible variant TB0114-DKML^^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.
  • visible variant TB0114-CKGL TB0114-CKLJ^^A Brain Bag in Coyote (light brown) Ballistic.
  • visible variant TB0114-CKGL^^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.
  • visible variant TB0114-WKGL TB0114-WKLJ^^A Brain Bag in Wilderness (forest green) Ballistic.
  • visible variant TB0114-WKGL^^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.
  • visible variant TB0114-NKDJ^^A Brain Bag in Constellation (light blue) 525 Ballistic.
  • visible variant TB0114-NKDJ^^A profile shot of the Brain Bag in Constellation (light blue) 525 Ballistic.
  • visible variant TB0114-NKLJ^^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.
  • visible variant TB0114-RKML TB0114-RKGL TB0114-RKOL^^A Brain Bag in Ursa (greyish-brown) Ballistic.
  • visible variant TB0114-RKML^^The Brain Bag in Ursa (brown-grey) Ballistic with the front main compartment zipper opened to reveal its Moss (dark green with green grid) 210 Cerylon interior.
  • visible variant TB0114-RKOL^^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.
  • visible variant TB0114-RKGL^^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.
  • visible variant TB0114-PKDL^^A Brain Bag in Raspberry Ballistic.
  • visible variant TB0114-PKDL^^The Brain Bag in Raspberry Ballistic with the front main compartment zipper opened to reveal its Dusk (purplish-blue with light blue grid) 210 Cerylon interior.
  • visible variant TB0114-VKPL^^A Brain Bag in Saguaro (olive green) Ballistic.
  • visible variant TB0114-VKPL^^The Brain Bag in Saguaro (olive green) Ballistic with the front main compartment zipper opened to reveal its Persimmon (dark orange with light orange grid) 210 Cerylon interior.
  • visible variant TB0114-RKGL TB0114-RKLJ^^A profile shot of the Brain Bag in Ursa (greyish-brown) 525 Ballistic.
  • visible detail^^A rear shot of the Brain Bag.
  • detail visible^^A close shot of one of the side cinches buckled up and cinched down.
  • detail visible^^A close shot of the top front cinch strap and d-ring between the front pockets.
  • detail visible^^A close shot of one of the zipper flaps.
  • detail visible^^A close shot of the d-ring on the front of the bag.
  • detail visible^^A close shot of the zipper pulls under the zipper flap.
  • lifestyle visible^^A person getting coffee at a coffee shop while wearing a Brain Bag.
  • lifestyle visible^^A tight shot of a person wearing the Brain Bag.
  • lifestyle visible^^A tight shot of the shoulder strap on a person wearing the Brain Bag.0
  • lifestyle visible^^A person accessing the front left zippered pocket in the Brain Bag.
  • lifestyle visible^^A person hiking wearing a Brain Bag.
  • lifestyle visible^^A person wearing a Brain Bag over one shoulder while drinking an iced beverage.
  • lifestyle visible^^Person wearing a Brain Bag and ordering coffee.
  • lifestyle visible^^A person wearing a Brain Bag over one shoulder while drinking an iced beverage.
  • visible video^^A thumbnail for a video showing off the features of the Brain Bag.
  • visible video^^A thumbnail for a video explaining the features of the Brain Bag.
  • visible variant TB0114-GKOL TB0114-GKGL TB0114-GKIJ TB0104-GKLJ TB0114-GKLJ^^A Brain Bag in Nebulous Grey (grey) Ballistic.
  • visible variant TB0114-GKOL^^The Brain Bag in Nebulous Grey Ballistic with a Cobalt 210 Cerylon interior.
  • visible variant TB0104-GKLJ TB0114-GKLJ^^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.
  • Brain Bag
  • visible variant TB0104-MKLJ TB0114-MKLJ^^A Brain Bag in Mars Red (red) 525 Ballistic.
  • visible variant TB0104-MKLJ TB0114-MKLJ^^The Brain Bag in Mars Red 525 Ballistic with the front main compartment zipper opened to reveal its Cloud (light grey) 210 Ballistic interior.
  • visible variant TB0114-BKOL TB0114-BKPL^^A Brain Bag in Black Ballistic.
  • visible variant TB0114-BKOL^^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.
  • visible variant TB0114-BKPL^^The Brain Bag in Black Ballistic with the front main compartment zipper opened to reveal its Persimmon (dark orange with light orange grid) 210 Cerylon interior.
  • visible variant TB0114-BKGL^^A Brain Bag in Black Ballistic.
  • visible variant TB0114-BKGL^^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.
  • visible variant TB0104-LKDJ TB0114-LKDJ^^A Brain Bag in Cloud (light grey) 525 Ballistic.
  • visible variant TB0114-DKDL TB0114-DKGL TB0114-DKML^^A Brain Bag in Deep Blue (dark blue) Ballistic.
  • visible variant TB0114-DKDL^^The Brain Bag in Deep Blue (dark blue) 525 Ballistic with the front main compartment zipper opened to reveal its Dusk (purplish-blue with light purplish-blue grid) 210 Cerylon interior.
  • visible variant TB0114-DKGL^^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.
  • visible variant TB0104-LKDJ TB0114-LKDJ^^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.\
  • visible variant TB0114-UKDL TB0114-UKGL TB0114-UKOL TB0114-UKIJ^^A Brain Bag in Aubergine (dark purple) Ballistic.
  • visible variant TB0114-UKGL^^A Brain Bag in Aubergine Ballistic with a Mountain Grey 210 Cerylon interior.
  • visible variant TB0114-UKDL^^A Brain Bag in Aubergine Ballistic with a Dusk (dark purple with purple grid) 210 Cerylon interior.
  • visible variant TB0104-TKLJ TB0114-TKLJ TB0114-TKGL TB0114-TKDL^^A Brain Bag in Burnt Orange Ballistic.
  • visible variant TB0114-TKGL^^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.
  • visible variant TB0104-DKDJ TB0114-DKDJ^^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.
  • visible variant TB0114-DKDL^^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.
  • visible variant TB0114-DKML^^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.
  • visible variant TB0114-CKGL TB0114-CKLJ^^A Brain Bag in Coyote (light brown) Ballistic.
  • visible variant TB0114-CKGL^^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.
  • visible variant TB0114-WKGL TB0114-WKLJ^^A Brain Bag in Wilderness (forest green) Ballistic.
  • visible variant TB0114-WKGL^^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.
  • visible variant TB0114-NKDJ^^A Brain Bag in Constellation (light blue) 525 Ballistic.
  • visible variant TB0114-NKDJ^^A profile shot of the Brain Bag in Constellation (light blue) 525 Ballistic.
  • visible variant TB0114-NKLJ^^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.
  • visible variant TB0114-RKML TB0114-RKGL TB0114-RKOL^^A Brain Bag in Ursa (greyish-brown) Ballistic.
  • visible variant TB0114-RKML^^The Brain Bag in Ursa (brown-grey) Ballistic with the front main compartment zipper opened to reveal its Moss (dark green with green grid) 210 Cerylon interior.
  • visible variant TB0114-RKOL^^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.
  • visible variant TB0114-RKGL^^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.
  • visible variant TB0114-PKDL^^A Brain Bag in Raspberry Ballistic.
  • visible variant TB0114-PKDL^^The Brain Bag in Raspberry Ballistic with the front main compartment zipper opened to reveal its Dusk (purplish-blue with light blue grid) 210 Cerylon interior.
  • visible variant TB0114-VKPL^^A Brain Bag in Saguaro (olive green) Ballistic.
  • visible variant TB0114-VKPL^^The Brain Bag in Saguaro (olive green) Ballistic with the front main compartment zipper opened to reveal its Persimmon (dark orange with light orange grid) 210 Cerylon interior.
  • visible variant TB0114-RKGL TB0114-RKLJ^^A profile shot of the Brain Bag in Ursa (greyish-brown) 525 Ballistic.
  • visible detail^^A rear shot of the Brain Bag.
  • detail visible^^A close shot of one of the side cinches buckled up and cinched down.
  • detail visible^^A close shot of the top front cinch strap and d-ring between the front pockets.
  • detail visible^^A close shot of one of the zipper flaps.
  • detail visible^^A close shot of the d-ring on the front of the bag.
  • detail visible^^A close shot of the zipper pulls under the zipper flap.
  • lifestyle visible^^A person getting coffee at a coffee shop while wearing a Brain Bag.
  • lifestyle visible^^A tight shot of a person wearing the Brain Bag.
  • lifestyle visible^^A tight shot of the shoulder strap on a person wearing the Brain Bag.0
  • lifestyle visible^^A person accessing the front left zippered pocket in the Brain Bag.
  • lifestyle visible^^A person hiking wearing a Brain Bag.
  • lifestyle visible^^A person wearing a Brain Bag over one shoulder while drinking an iced beverage.
  • lifestyle visible^^Person wearing a Brain Bag and ordering coffee.
  • lifestyle visible^^A person wearing a Brain Bag over one shoulder while drinking an iced beverage.
  • visible video^^A thumbnail for a video showing off the features of the Brain Bag.
  • visible video^^A thumbnail for a video explaining the features of the Brain Bag.

Brain Bag

$245

Ready to Ship

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

What Goes Into A Tom Bihn Backpack?

Each bag is handmade in the U.S. using premium, hard-wearing materials—and built to last a lifetime, guaranteed. You're not just buying a bag, you're investing in decades of thoughtful design, durable function, and responsible craftsmanship.


Color & Material
Available Color options

Exterior Color:
Black
Interior Color:
Mountain Grey
Exterior Material:
Ballistic
Interior Material:
210 Cerylon


Carry-on Friendly
Made in Seattle
Lifetime Guarantee

Brain Bag

Join the Waitlist!

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.

Reviews

4.9
Rated 4.9 out of 5 stars
Based on 168 reviews
Total 5 star reviews: 157 Total 4 star reviews: 6 Total 3 star reviews: 3 Total 2 star reviews: 2 Total 1 star reviews: 0
168 reviews
  • BD
    Brian D.
    Verified Buyer
    Bought For Myself
    Product Standouts High Quality Craftsmanship, Versatile, Easily Adjustable, Comfortable, Unique
    2 months ago
    Bought For Myself
    Product Standouts High Quality Craftsmanship, Versatile, Easily Adjustable, Comfortable, Unique
    Rated 5 out of 5 stars
    My Favorite Bag

    If I could only have one bag, this would most definitely be the one. I carried my first Brain Bag for about ten years before handing it down to my son. I'm even more happy with this new purchase. The straps have been improved, and I love the blacked-out logo. The Brain Bag is so unique in its styling and its versatility. It tightens down to be a slim EDC, expands to easily carry a coat or bigger item, or expands yet more as a travel bag. Using packing cubes, I have flown with just my Brain Bag on 3–5 day trips.

  • FP
    Fred P.
    Verified Buyer
    Bought For Myself
    Product Standouts Comfortable, Thoughtful Design, Good Storage Size, High Quality Craftsmanship
    5 months ago
    Bought For Myself
    Product Standouts Comfortable, Thoughtful Design, Good Storage Size, High Quality Craftsmanship
    Rated 5 out of 5 stars
    Phenomenal Bag

    After about a year with a Synik 30, I started to want something that fit just a bit different. I couldn't describe what was wrong, as up until this Brain Bag, the Synik 30 was my favorite backpack I'd ever owned. I kept looking at the Brain Bag, and finally purchased one to see (even though it was technically bigger than my Synik 30) if it would be better for my EDC.

    Within a week, the Brain Bag has moved to my number one all time favorite bag. I do miss a little of the organization of the Synik, but the Brain Bag has a ton of amazing organization on its own. I keep getting surprised as to what can fit in those front pockets.

    Some call this bag a beast... I just don't see it like that. Sure, its ability to swallow anything I ask it to contstantly amazes me... but yet, it feels more compact than others. Very comfortable even at heavy weight and the handle... wow... just perfect.

    Make yourself happy and get some strap keepers (2 pair at least) as this bag does have some dangle to contain. This said, the strap keepers work perfectly to contain the compression straps and the sternum/umbrella were handled with some rip cord.

    Phenomenal bag. Looking forward to many long years with my new favorite bag.

  • DR Profile picture for Daniel R.google logo
    Daniel R.
    Verified Buyer
    Bought For Myself
    Product Standouts Thoughtful Design, Comfortable, High Quality Craftsmanship, Unique, Versatile
    5 months ago
    Bought For Myself
    Product Standouts Thoughtful Design, Comfortable, High Quality Craftsmanship, Unique, Versatile
    Rated 5 out of 5 stars
    Excellent Bag with a Pedigree

    I have a Brain Bag from ~2003 as well as one from ~2024. Over 20 years apart! The updated version has a lot of nice improvements. This is a BIG bag. In a nutshell, this is a really interesting and big bag, and it's priced very modestly for what you get, especially for a Tom Bihn bag. If you want a Tom Bihn bag but are balking at throwing down $400+ for some of the newer ones, this may be the bag for you. It delivers all the space and more of more modern designs, some really nice and unique features to boot -- and you'll be wearing a bit of Tom Bihn history!

    The original Brain Bag was designed to hold "Brain Cells", which was Tom Bihn's original laptop-holding device, which was thicker than a cache because it was designed for older-school non-slim laptops. They were a padded thin rectangle with crush-protection, so it had more structure than a cache. The bag feels amazing with a Brain Cell inside, as this provides additional structure, sort of like having a frame, but better.

    I have a few Brain Cells -- one original and one I purchased from eBay. They are cool. I assume this bag would also work very well with caches. But the "correct" way to use this bag is to find a Brain Cell or two on eBay... or beg Tom Bihn to bring back the Brain Cell (I still prefer them!) or buy something equivalent to them from somewhere. They are cool.

    The cut of this bag allows it to massively expand to hold lots and lots of things. You can throw in a couple of laptops, as well as bulky items…

  • T
    Tim
    Verified Buyer
    Bought For Myself
    Product Standouts High Quality Craftsmanship, Sewn in USA, Durable, High Quality Finishings, Good Storage Size
    9 months ago
    Bought For Myself
    Product Standouts High Quality Craftsmanship, Sewn in USA, Durable, High Quality Finishings, Good Storage Size
    Rated 5 out of 5 stars
    Finally, a well made backpack!

    I looked for years to find a sturdy and reliable bag that was well made and would last through my travels. This backpack is extraordinary. Everything I have been looking for!

    So far I have taken to Spain, Morroco and Mexico in some harsh environments and it is perfect. The zippers are high quality and the material is excellent. I couldn't be happier and I will be buying another smaller one for short trips.

  • CC
    Clayton C.
    Verified Buyer
    Bought For Myself
    Product Standouts Good Storage Size, Comfortable, Thoughtful Design, Sewn in USA, Easily Adjustable
    1 year ago
    Bought For Myself
    Product Standouts Good Storage Size, Comfortable, Thoughtful Design, Sewn in USA, Easily Adjustable
    Rated 5 out of 5 stars
    One tough and good looking Bag

    Packed this thing to the gills for my 8 day jog around Washington state, and it performed like a champ. I also received several compliments on the appearance and style. I have a feeling this one will be my "go to" for the annual vacation I take with the wife! Everything you see pictured including the camelback fit in this 36 liter beauty. I will be recommending this bad boy to everyone.

Quality Designs Since 1972

Designed with obsessive attention to detail, we pride ourselves in offering bags in unmatched quality and durability—whether you're commuting, traveling, or navigating daily life. Built to last, made to move with you.

The BIHN Guarantee

We stand behind every bag we make. If it’s our fault, we’ll fix it—no questions asked. For everything else, we offer honest repairs in our Seattle factory.