Seek Outside

Brooks 7400 Backpack


The Brooks 7400 Cubic Inch Backpack from Seek Outside is the latest creation designed specifically with lightweight backpack hunters in mind that want a pack that can function as a small daypack, an expedition pack, or to carry out camp and a solid load of meat.  The Brooks utilizes a state-of-the art design that can be configured to use as a 1200, 2400, 5800 or 7400 cubic inch pack depending on how big your load is and how much space you need.  And the best part is it still weighs an astonishingly light 4.5 lbs with straps and accessories.

The Brooks backpack utilizes X-Pac material with a roll top bag for a completely water proof backpack.  Dual side pockets with included internal accessory pockets allow you to keep your small gear organized.  The side pockets are also perfect to put a spotting scope and/or water bladder, while the side and back compression straps allow for you to attach your rifle or bow to the pack.

Recommended ad-ons:

  • Seek Outside's Hip Belt Pockets-The hip belt pocket attaches to your hip belt and give you quick access quick and easy access to your GPS, water bottle, game calls, food and other small items.

*All packs will ship within 3 weeks of order placement



  • Patented Articulating Frame. Suspension will comfortably carry anything you can.
  • X-Pac™ Backpack Fabric - forever waterproof & durable, eliminating the need for a raincover.
  • Large 5000 ci rolltop packbag with fully separating side zipper for easy access.
  • Dual 1200 ci zippered side pockets.  Large enough for 85 mm angled spotting scope, tripod, or 3l water bladders.  (Bladder ports included).
  • Versatile compression system utilizing Gatekeeper hardware.  Use it, lose it, or move it.


  • Minimum Weight - 4 lbs.
  • Shipped Weight - 4.5 lbs - includes dual cross stays, six compression straps, two internal accessory pockets.
  • Volume - 7400 ci total - 5000 ci main packbag, 1200 ci per side pocket.


  • Adjustable frame, Can be used at 24"-  28" height. Optimized for 26 inch height.  
  • Four hip belt sizes, fits 29 to 42 inch waists
  • Shoulder harness easily adjusts to fit 15" - 22" torsos.
  • See below for fit and sizing information

Rain Cover / Seam Sealing

  • Main pack bag is made of X-Pac™ waterproof material and features a waterproof rolltop closure.  Seam sealing the outside seams is recommended for exceptionally wet environments.  Water can penetrate the side zipper, but usually not in a rain situation with the pack upright - the zipper flap does an excellent job of repelling rain.  Waterproof stuff sacks are recommended for exceptionally rainy conditions, and drybags for submersion or severely wet conditions such as bushwacking or canyoneering.  
  • Side pockets are 500D Cordura and are not waterproof.

Frame height innovation from Seek Outside

Seek Outsides’ Patented Articulating Frame and suspension simplifies frame height decisions.

Instead of buying a Small, Medium, or Large frame height, you buy one frame and then adjust the frame height to suit your needs.

Our base frame is 24” tall and can be adjusted to 26” or 28” through the use of frame extensions.

So, which frame height is right for you? The answer to this question depends on a couple of factors.

  1. Your torso length.
  2. Your expected load weights.

Finding Torso Length


Torso length is the distance between the protruding vertebrae at the base of your neck - known as C7 - and the bottom of your back.

To measure, recruit some help. Take a soft tape and hold it in the center of C7.  Next find the top points of your hipbones and draw an imaginary line across your back between those points.

The distance between C7 and the line that connects the iliac crests is your torso length.

For reference, a 15” measurement would be a short torso, 18” about average for an adult male, and 22” would be a very tall measurement.

That’s great, but what does it mean?

If you’re on the lower end of the torso length scale - say 15-16” - then you’ll probably be very happy with the base frame height of 24”.

If you’re in the middle of the scale - 17-19” - then you can probably use all three frame heights depending on your expected load.

If you’re in the upper end of the scale - 20”+ - you will probably be happiest with either a 26 or 28” frame.

A taller frame is more comfortable for heavy loads than a shorter frame - within reason.  If you have a 15 inch torso, then a 24 inch frame IS a taller frame for you.

If you have an 18 inch torso and plan to carry heavy loads of 50 plus pounds, then a 26 or 28 inch frame is recommended.

Backpack hunters especially are faced with the prospect of carrying extremely heavy loads approaching or exceeding the century mark. Under these conditions a 28 inch frame for nearly every torso height is recommended.

The reason? Because the taller frame gives you more real estate to carry bulky loads, and more importantly allows you to distribute the load so that 70% is centered over the shoulder blades. This arrangement gives you good balance without being “tippy”.

The value of our adjustable frame height really comes into play for backpack hunters in another way.

If you hoof it four miles into basecamp and day hunt from there, our pack is two in one. With the extensions it is your heavy hauler.

After you’re in camp, simply remove the extensions and you’ve converted the pack into a much smaller profile day pack suitable to slipping through dark timber.

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