Blog Layout

The Fortitude Pack Frame Secret

Nathan Murr • October 30, 2023

The Pack Frame That Will Change Everything

Principle Theories of Design
There are two primary design theories for pack frames: internal frames and external frames. Although both have their own merits and limitations, we truly believe that the external frame is the only choice for carrying heavier weight. Load carriage with a backpack or rucksack is not for the weak of heart or body and the ability to shoulder weights in excess of 50 lbs is tough enough before the first step is even taken.


This burden of weight is further compounded by the movement and “sway” of the load as you hike along. The more your pack moves (sways) with your body movement, the more you fight the movement of that weight. (Newtons third law strikes again!) The ideal way to overcome this unwanted movement is for the mass to be as close to your body as possible. This may sound simple enough, but can present its own challenges in accomplishing. People spend small fortunes on the newest or “best” rucksacks, when almost all of the issues they seek to resolve is actually caused by the frame system being used. 


Custom Configured For You


The Fortitude Secret

The Fortitude frame is the base of solving all of these issues, while adding a modular design for future upgrades. Issues with comfort and premature fatigue are also addressed by adding the Fortitude frame. As the saying goes, “a tight pack is a light pack.” This means that having the load strapped down secure, evenly balanced with the load weight distributed throughout the pack and as close to your back as possible, will help mitigate the unwanted sway and movement that will otherwise rapidly become exhausting. The Fortitude frame can be configured to match your body size, and even forced into different shapes to match the contour of your back. 

What Other Packs Didn't Do

Early pack frames were originally made from wood or heavy steel and had few features to aid comfort or load distribution. During the 1960s the first real improvement to frame design came to both military and civilian rucksacks in the form of aluminum tubing riveted together. These frames were light and strong, but often suffered from broken rivets and welds which made field repair extremely difficult. These problems with material failure exist even today.


Many modern day frames are made from injection molded polymer which is more likely to fracture or crack than a metal frame. They often fail at the worst possible time, with little more to be done aside from complete replacement with a fresh frame which you are unlikely to have along with you. Internal frame designs also are with issue, where most struggle to properly carry heavier loads and are prone to roll back and forth on your back while moving. 


More than just an ALICE pack frame for the 21st century.

The Fortitude pack frame is the result of decades of use and comprehensive study of existing backpack frames from both the military and commercial industries. Its Monolithic design is as close to "indestructable" as you can get.


The Fortitude frame addresses all the issues that have plagued load carriage for decades, with a modern, modular design. Made entirely from light-weight aircraft grade aluminum, the frame is curved to match the profile of your back. It is thin enough to slightly flex with your body movement, but rigid enough vertically to support more than 150 lbs of weight. The monolithic design has no additional parts to break or wear out, so you can go the distance knowing your frame is up to the task. The Fortitude frame is designed to work with all versions of the legacy ALICE pack, including all ALICE belts and shoulder straps. It is also fully cross compatible with the proven current USMC issue FILBE pack and FILBE componnents. Our design allows for the Fortitude frame to be used with a wide array of packs on the market, so pretty much any pack that accepts an ALICE frame will accept the Fortitude! It can also be used as a stand alone frame with no pack at all. Using just your preferred shoulder straps and waist belt, it can be used as a packboard to haul odd-sized duffle bags, waterproof bags, water containers, fuel cans, chainsaws, tools, fresh elk quarters, or pretty much anything! 


Specs:


• 2.6 lbs

• Strong monolithic aluminum design

• Milspec type 3 hardcoat anodized finish 

• Modular design fits any pack that accepts an ALICE size frame

• Cross compatible with the USMC FILBE pack 

• Can be used independently as a packboard 

• Dozens of webbing cutouts for customization 




By Nathan Murr March 26, 2024
The life you save, just might be your own.
Share by: