An unbeatable 13" laptop bag, or a super slim Flight Bag. Room for  both a 13" MacBook Pro AND an iPad AND some manila folders and douments.  Remove the 2-inch Center Section and end up with the B0 SLIM.
Two different bags for the price of one.
Included Items:
    Pocket Cap Front
    CS2
    Flat Cap Rear
    Main Handle
    Shoulder Strap
If  you're an Airline Captain and you plan on carrying your B2 COMPUTE on  your J-Hook hanging off the back of your rolling suitcase, you should  swap out the included MAIN HANDLE and instead purchase the MAIN HANDLE  J-HOOK (see the Accessories Page). This alternate handle serves to keep  the J-Hook centered on the BrightLine Bag.
SIZE:
Interior of CS2: 13.5" tall, 10.0" wide, 2.0 inches deep. (34cm x 25cm x 5cm)
Exterior of entire bag: 14.0" tall, 10.5" wide, 3.75" deep. (36cm x 27cm x 9.5cm)
Keep  in mind that the bag material is flexible, so the size of the interior  storage may be able to "stretch" out just a bit in one direction or  another. Also keep in mind that over-stuffing your bag can cause seam or  material failure, and this is not covered by warranty.
EMPTY WEIGHT:
3.7 lbs. (1.7 kg)
TOTAL NUMBER OF AVAILABLE FLEX SYSTEM SIDE POCKETS:
Zero.  (the CS2 is not wide enough to have any FLEX-Mount side pocket stations.)
MODULAR EXPANSION CAPABILITY:
Unlimited.   You can add any of the other FLEX System modules to this bag, in ay  order, to make a bag as big or as small as you need on any given day.
EMBROIDERY OPTIONS:
The  top front pocket cover of the POCKET CAP FRONT module can be removed to  make it easy to add custom embroidery. Just remove this pocket cover  and hand it directly to your current embroidery provider.  (We don't  offer any embroidery service.)
• DESCRIPTION •
The  B2 COMPUTE is the FLEX System "computer bag" and is perfect for anyone  who wants a small, efficient way to carry their 13” laptop along with  all the associated essentials. Or, it can serve as a compact document  bag, or a lunch bag, or it could even carry a single change of clothes.
The  B2 consists of the POCKET CAP FRONT, CENTER SECTION 2, and FLAT CAP  REAR.  (It also includes the MH and SS.  It does NOT include a SLIM  HANDLE KIT.  If you ever think you'd like to remove the CS2 and zip just  the two End Caps together to make the B0 SLIM, you'll need to make sure  you also order an SLIM HANDLE KIT.)
The CS2 provides, you guessed  it, two inches of storage depth, but keep in mind that there is also  two thin flat storage areas BETWEEN the three modules. (Remember, it is a  soft bag so it can expand slightly in every direction.)  Keep in mind  also that you can add any other Center Section to the B2 (like zip a CS4  in between the CS2 and the FCR) to add more storage on certain days.   Any FLEX System module can zip onto any other FLEX System module.  The  Main Compartment of the CS2 in the B2 has locking zipper sliders.
This  configuration will very commonly be used to carry a 13" Laptop along  with an iPad (or other tablet) and some additional documentation. But it  might also serve as an ultra narrow VFR flight bag if you happen to  have the compact in-the-ear type of headset, or a headset where the ear  cups fold flat. It's also a great commercial carry-on bag, or an  outstanding daily personal bag (also known as a "man purse").
The  other great thing about this bag is that it is actually TWO bags. Not  only is it a B2 COMPUTE, but you can also build a B0 SLIM by removing  the center section and zipping just the two End Cap modules together.   (But again, if you plan to do so, be sure to order a SLIM HANDLE KIT.)
Storage  on the B2 starts with the POCKET CAP FRONT: The POCKET CAP FRONT acts  like the "hub" for your entire FLEX System. No matter which  configuration you carry you'll be attaching the POCKET CAP FRONT to one  end of your bag. And it's the "hub" because it holds all the important  small stuff and tech stuff and personal stuff that you want with you no  matter what. If you change configurations, you'll always move the POCKET  CAP FRONT to the new configuration which means you'll always have all  this key stuff with you, without any repacking or reloading.
PCF:    The POCKET CAP FRONT module offers a variety of pockets organized into  three "main" pockets and six "secondary" pockets for a total of nine  small pockets on the front panel. In these nine pockets you'll store all  the cords, cables, chargers, batteries, stylus, memory cards, USB  drives, etc, for all your electronic gear. All these important items  will finally be separated and organized like you've always wanted. In  addition, you'll have room for your flight timer, fuel testers, E6B,  flashlights, compact portable GPS, etc. Not to mention space for your  wallet, keys, cellphone, business cards, multi-tool, glasses, pens,  markers, and things like Ibuprofen, Chapstick, bandaids, etc, and even  your digital camera. There is also a flat half-height slip pocket on the  inner surface of the module where you can stow an important document or  two like a copy of your medical or your passport.
Next, comes the  CS2 (2-inch Center Section), which is designed to hold 13” laptops or a  small collection of documents (or both). (Many, but not all, 14"  laptops will also fit.) The CS2 can be accessed by unzipping the two  zippers to open the entire rear panel, giving access to the gray  interior.  The Main Compartment of the CS2 has locking zipper sliders.    NOTE: Many of the photos show a small one-inch webbing strap going  across the very top of the module. This strap has been removed. It is no  longer part of the bag.  We removed the strap because it was left over  from the pre-FLEX days and it is no longer needed as a secondary handle.  We just didn't want to go through all the trouble of reshooting all the  photos just for this minor change.  We hope you understand.
The  FLAT CAP REAR module offers two flat pockets on the outside, and one  flat half-height slip pocket on the inner surface of the module. The  primary outer pocket is accessed from the top and has a cover flap that  is secured with Velcro. This where you'll likely store your iPad (as  long as it's not in a thick case), or a manilla folder or two for some  documents, or a magazine. There is a second flat panel that covers  two-thirds of the outside of the main panel that is broken into two  halves - an upper panel and a lower panel. By default, the bottom edge  of the upper panel is "tucked" into the top edge of the lower panel.   This allows both panels to act together as a single slip pocket that  works great for sticking a boarding pass or other simple paperwork  here.  If the top panel is "untucked" from the bottom panel, this allows  the telescoping tubes of a suitcase or folding cart to pass through and  the panel serves to secure your bag to those tubes (especially when  this FLAT CAP REAR is attached to other modules to form bigger bags like  the B2 COMPUTE, B4 SWIFT or the B7 FLIGHT).  Then, when you're done  putting your BrightLine Bag on top of your suitcase, you can just "tuck"  the top panel back into the bottom panel and it becomes a slip pocket  again.
The B2 COMPUTE comes with a Main Handle and a Shoulder Strap.  It does NOT come with the SLIM HANDLE KIT.