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Re: pack fitting



On Mon, 16 Sep 1996 12:45:40 -0500 (CDT) Jeff Mosenkis
<jm1360@cnsvax.albany.edu> writes:
>I have had a couple of requests to post something about pack fitting.  
>I could not find an old copy of what I posted, if someone has it, can 
>they please post it?
>
>-jeff
>

I don't know that it's entirely appropriate to repost the entire
thing, but here it is anyway...please forward your flames to jeff :-)

jim

---------------------------------------------------

From: at-l
To: Multiple recipients of list
Subject: Re: Properly Fitting Backpacks
Date: Sunday, March 10, 1996 5:29PM

This is going to be a long one folks...


On Sun, 10 Mar 1996, Bryan Gene Cable wrote:

>      I've seen a lot of advice on this list saying to have a backpack
> properly fitted, but none explaining *how* to properly fit a backpack. 
 I'm
> a novice so these things aren't obvious to me like they might be to
many 
of
you.
>      So how do you do it?  How do you to fit a backpack to a body?  Any

and
> all suggestions are welcome!

In my experience, a properly fitted backpack can mean the difference
between a great trip and the most miserable experience of your life.  If
a shoulder strap is digging in and ripping your shoulder apart or the
hipbelt is pinching a nerve and making you limp, your friend won't be
able to appreciate the beautiful views.  Who wants to talk about the
majesty of the wilderness after carrying a torture chamber for 15 miles?
More times than I can count, the source of a horrible trip for someone
could have been easily solved be tightening a strap a quarter inch.

I worked in outdoor retail and used to do this all the time.  Keep in
mind that each backpack is different, but here are some general
guidelines:

#1) Make sure you have the right size, many packs (both internal and
external frame) come in different sizes, including many geared for women.
It is easy for a salesperson (especially one who is inexperienced or in a
hurry) to pick up the wrong size, so double check it, there is usually
some tag hidden somewhere with a marking.  If the pack comes with product
literature or something attached, the model and size is often on that.

Remember that your pack size is determined not by your height, but by
your
torso length.  People of different heights can have the same pack size if
they have the same torso length.  Pack manufacturers generally have
guidelines for torso lengths if the packs come in different sizes (ie:
Mountainsmith, Gregory), if they don't they usually have a more
adjustable suspension (ie: Lowe) but if you are on the extreme ends of
the adjustments, it might not be the pack for you.

You can get your torso length from using a tape measure (like the fabric
ones tailors use) and have a friend measure your spine from the 7th
vertebrae (the bump where your neck meets your shoulders) to in between
your hip bones).


You can do most adjustment with the pack empty, but it will ride
differently with weight in it, so make sure to readjust it with a full
load.
Remember also that the goal is to put the weight of the pack on your hips
(the weight bearing bones of your body) and get it off your shoulders
(which are mostly there for balance).

INTERNAL FRAME PACKS:

General guidelines- the shoulder straps should meet the pack about 2
inches below your shoulder.  There is often an adjustment to change where
the shoulder straps are anchored to the pack.  This is the major
adjustment.
                   - the straps that go from the shoulder straps up and
to
the
back of the pack are called the 'load lifters' or 'stabilizers' for that
reason.  Their major function is to lift up from the shoulders and take
any weight from there and put it on the frame of the pack.  They also
stabilize the top of the pack to help minimize sway.  The bottom part of
the strap should be anchored to the shoulder strap at about collarbone
level.  It should join the pack at around earlobe height.  You should
look for about a 45 degree angle on it.  If the angle is too high
(pulling almost straight up) or too (pulling straight back) low it won't
do
the job right.  This is often the major problem encountered when fitting
a pack to someone who is on the extreme end of the spectrum (very tall or
very short for the packframe size).

                    - The hipbelt is the most important part of the pack
it is supposed to take around 80% of the weight.  Make sure it is snug,
but not too loose and not too tight and that you have room to layer
clothing under it.  Make sure it will ride high enough to transfer weight
down onto the hips.  I have pretty scrawny hips and have had problems
with the pack slipping too low.  There also might be straps that pull the
bottom of the pack in close to the hipbelt ('hip stabilizers') and can be
adjusted for comfort and ride.

                      - The sternum strap goes across your upper chest
connecting the shoulder straps.  This helps keep them on and often goes a
long way toward making the fit work for you.  Make sure it does not
constrict your chest and interfere with breathing.


        In putting the pack on, loosen all the straps first and then put
the pack on.  In order tighten the Hipbelt, shoulder strap (the length
adjustment, usually at the bottom of padding), and the shoulder load
lifters.  Then work with the other adjustments to tweak out a comfortable
fit.  Remember to loosen the straps in the reverse order before taking
the pack off (and loosening the hipbelt buckle will make sure when you
unbuckle, it won't snap back, this eventually wears down the corners of
the buckle that engage when it closes).

        Experiment, get a balance that works for you between hips and
shoulders taking weight once your out on the trail.  Remember that the
pack will feel different on the trail than in the store.  Most internal
frame packs require a modest break in time, both for the pack and for
you, so be a little patient.

EXTERNAL FRAME PACKS:

Most of the same applies.  If you don't have the shoulder load lifters,
then the shoulder straps themselves should anchor to the frame at that 45
degree level to make sure that they don't dig down into your shoulders.
This may entail a little more work, you might have to take out a pin and
change some spacers around (this was a huge pain to do in the store 10
times a day, but you will only have to do it once).

In general, your external frame pack will ride higher than your friend's
internal frame.  That's OK, it is supposed to be like that, don't try and
make yours ride like his.

General Guidelines To Remember When Buying a Pack:
Try it on with weight in it!  Every pack feels good empty.  If the
salesman doesn't want to do that for you, tell him to piss off and go
somewhere else!  You wouldn't buy a car without test driving it.
As someone else on the list mentioned, bring in your own stuff and out it
in.  (preferably in stuff sacks)
Also discuss with the salesman what way to pack you gear will work best
for
you (there are a few different schools of thought on the issue) discuss
the
pros and cons of each.

MAKE SURE THE SALESPERSON ADJUSTS THE ONE YOU ARE TAKING HOME!!
No matter how good the demo model feels in the store, if you don't make
the
same adjustments to the one you get, it won't feel right!!  If you don't
remember how do do it, have the salesperson do it before you leave the
store.  Tons of people came into our store saying "well, I bought this
pack at store X and when I got on the trail it didn't fell right."
Usually it took under 3 minutes to solve the problem.


Well, that's most of it, remember that sometimes a pack model just won't
fit you.  That happens.  People are built differently and some brands
just don't fit certain people.  Don't despair, keep looking.
Fortunately, most pack manufacturers are making a larger range of shapes
and sizes. For a long time women had to just bear with using packs for
short men, recently though the designers have finally realized that there
are some physiological differences between the two sexes and most now
make at least one line of packs designed for women.
Women - make sure to ask if the pack you like is make in a model for
women (often stores don't stock those models because fewer women buy
packs so it is not as profitable to stock them).

It sounds complicated, but it really isn't.  If I have been unclear, let
me know.

Good luck!

 -jeff

Standard Disclaimers Apply


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Jeff Mosenkis,
University at Albany - Psych, Anthro, Judaic Studies
                                                                         
    


jm1360@cnsvax.albany.edu

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