A Defender Pack

Size Guide

Carrying capacity requirements change from trip to trip. In the past this often meant owning multiple packs to accommodate load variances. The Defender eliminates the need for several packs as it’s designed for versatility. Conveniently placed straps allow you to compress the pack for short­ duration loads or specific uses. For longer expeditions the Defender’s cavernous main compartment expands to hold enough gear and supplies for extended stays in the field.

  • This kit includes:

    • 26" x 12" x 8"
    • Top loading design, with spindrift collar
    • Dual zipper front access without removing straps
    • 2 rows of PALS, 3 columns wide on the front flap
    • 3 rows of PALS, 5 columns wide on each side pocket
    • 2 side pockets that fit 3 liter hydration bladders, with loop hanger
    • Passthrough openings on each side pocket for hydration
    • Internal hydration pocket
    • Over the shoulder zipper for cables or hydration
    • Ring and hook attachment points for modularity
    • Adjustable height shoulder straps
    • Antimicrobial mesh back panel with ventilation channel
    • Weight: 4.6 lbs.
    • Volume: 3000 cubic inches + side pockets + lid capacity
    • Material: 500d Cordura and 330d Cordura

Collections: Frontpage, Mountaineering, Packs

Category: 3 Day +

Type: Backcountry Pack

Versatile Pack

Despite its large 3,000 cubic inch size and ability to store 3 full sized hydration bladders, the Defender Pack surprisingly weighs very little when empty. This means you can conserve more of your energy and dedicate it to carrying your load. This is the ultimate rucksack and the last one you will ever need.

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Customize Your Fit

Get The Right Fit


To get the most of the advanced load-bearing ability of your AttackPAK, a properly sized belt and frame is essential. Getting the right fit ensures that all your pack components work together to relieve stress on the core, shoulders and back by transferring the weight of the load to the hips and legs.




Measuring for AttackPAK frame size

  Step 1. Take a measurement from your C7 to the floor

C7 is the bony part of your spine at the back of your neck, just above your shoulders. Stand straight and drop the tape down your back to the floor

  Step 2. Take a measurement from your waist/hips to the floor

Place your hands on your hipbones with your thumbs pointing back toward your spine and your fingers wrapping forward. Hold your hands out parallel to the floor and drop the tape from your hands to the floor


Using the measurements you took above, in inches, put the numbers into this formula:

(Step 1) – (Step 2) + (2”) = your Optimal Frame Size (OFS)


Measuring for AttackPAK waist belt size

Measure your waist at the top of your hip bone. You can use paracord, then stretch it out to measure the length with a ruler or tape measure.

28"- 30" around your waist at a comfortable resting place = Small

32"- 34" around your waist at a comfortable resting place = Medium

36"- 38" around your waist at a comfortable resting place = Large

40"- 42" around your waist at a comfortable resting place = Extra Large

44"- 46" around your waist at a comfortable resting place = XXL Large

If your measurement falls outside the 28"-46" range, please contact us to place a custom order.


Gearing up with your AttackPAK 

Insert the frame in the frame sleeve on the back of the pack. Make sure it is pushed up to the top webbing


 Check the frames size

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