The ultimate on-your-back, student or business organizer, the Brain Bag is designed to accommodate the optional Horizontal Brain Cell or Vertical Brain Cell laptop cases to protect your laptop. How well does the Brain Cell protect your laptop? Watch Drop Test: The Movie. The Brain Bag will also accomodate the Size 2XL and 2M Cache sleeves, which are designed to fit larger 17" PC laptops that won't fit in even our largest size of Vertical Brain Cell.

The Brain Bag consists of two main compartments plus four external pockets. The small top pocket on the back is perfect for a wallet and has an inside snaphook for keys. The two vertical front pockets are large enough for water bottles or even a small thermos; both inside pockets are pen/pencil organizers. The left pocket has an outside flat mesh pocket for brochures, plane tickets or even a small U-Lock. Between the pockets are two lash straps for umbrella or a rain coat.

Both main compartments can accept the Annex clips that allow you to clip the Horizontal Brain Cell or Vertical Brain Cell laptop cases securely inside of the Brain Bag so that you can carry your computer or your books against your back, as you like. You can actually carry two Horizontal Brain Cells or Vertical Brain Cells, and therefore two laptops in the Brain Bag. (If you want to carry two Brain Cells inside of the Brain Bag, be sure to ask for an extra set of Annex clips: the Brain Bag comes with one set, but you'll need two sets to carry two Brain Cells.) Side compression straps compress the bag when it is not full and stabilize the load. The Brain Bag has a quality nylon/foam/nylon laminated pad on 2" webbing handles, contoured shoulder straps and removable 1" sternum and 2" waist straps. The back is made of Dri-Lex Aero-Spacer mesh and is padded with 3/8", high quality, closed-cell foam.

If the organizer pockets on the front of the Brain Bag just aren't sufficient, or if you need to carry papers, folders, etc. and keep them neat, consider adding the Freudian Slip. One side will protect those papers; the other provides extra organization for pens, business cards, and small electronics or laptop accessories.

The Brain Bag is made with fabrics that are coated on the interior with urethane for water resistance and treated on the exterior with a durable water-repellent finish. Over time these surface treatments can wear, leaving your bag and its contents more exposed to rain and snow than you might like. Nikwax is designed to replenish the water-repellent finish. It is also recommended as an extra precaution for your new Brain Bag if you intend to use it in an extremely wet environments. Nikwax is environmentally friendly and is not tested on animals.