by Joseph Hazelbaker

Created on: April 12, 2007   Last Updated: April 27, 2007

Backpackers have two options when choosing a backpack frame: "external" or "internal". Those words describe the major differences between these two categories of backpacks: internal frames have the frame (or frame sheet) on the inside while external frames have the frame on the outside. Simple as that.

~ BACKGROUND ~

Back in the day, external frames were the only option. Limited by available materials and early technology, the only way backpack manufacturers were able to create backpacks with large capacities was to create an equally large frame to hold the weight and to distribute it properly over your body.

As technology evolved and newer materials were developed, manufactures found ways to shift from a tube frame to a flexible plastic sheet frame that could slide inside the backpack. The result was a frame that could hold similar amounts of weight in a less bulky package. Internal frame backs were lighter, better fitting, and provided more mobility to the user.

Consequently, internal frame packs have largely replaced their larger external frame cousins. Yet, externals still have their time and place. Die-hards who started backpacking before there were internal frame packs, people who carry very heavy loads, and youngsters getting started in the pursuit are all good candidates for an external-framed backpack.

~ SUMMARY OF BENEFITS OF EACH FRAME TYPE ~

The benefits of an external-frame pack are:

1. you can carry heavy loads more easily with an external frame pack;
2. packing is easier in external frame packs as they are more forgiving and can carry awkward loads more easily;
3. external-framed backpacks tend to last longer;
4. external-framed backpacks are less expensive than most similarly sized internal-framed backpacks;
5. external-framed backpacks are great for kids and young adults, who are likely starting out and doing so on relatively easy terrain, as the packs are tough and handle awkward loads better.

The benefits of internal-frame backpacks are:

1. they don't alter backpacker's center of balance;
2. they don't have trail clearance issues as they sit low and close to the backpaker's body;
3. they lighter weight;
4. they provide more flexibility and versatility;
5. there is a huge variety of sizes and styles;
6. they are highly adjustable

~ CHOOSING A BACKPACK ~

Now that you have an idea of what the differences are between the two types of backpack frames, here are some tips on how to choose the specific pack that is right for you.

~ GENDER ~

Backpacks are not unisex

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