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Backpacking Light

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You are here: Home / Blog / Standards Watch: Introduction

Standards Watch: Introduction

by Rex Sanders on September 5, 2020 Blog, New Features

Backpacking product standards: Introduction Icons

Overview

We’re all frustrated by inconsistent measurements and descriptions of backpacking products. Too often, you can’t reliably compare weights, volumes, temperature ratings, seasons, and other key quantities between different manufacturers. Yet a wide variety of standards and tests apply to backpacking gear that should make selection much easier.

Standards Watch will be a monthly column that explains important backpacking product standards, interviews key people, and describes how the industry uses, abuses, or ignores tests and standards. I’ll also critique existing standards and marketing, point out missing standards and tests, and propose other ideas to improve life for backpacking consumers.

Like most human endeavors, making standards is far messier than it appears from the outside. Many contain significant but hidden compromises. And some standards and tests are more rigidly defined than others – allowing room for misinterpretation or even fudging.

Yet slavish devotion to standards sometimes causes other problems – inhibiting innovation, misleading consumers, imposing high testing costs, and more. I plan to highlight those issues as well.

Backpacking product standards: Cubit NIST

Fragment of an ancient Egyptian cubit rod carved in granite. Credit: U.S. National Institute of Standards and Technology, public domain.

Importance of Standards

Historically, measurement standards varied over time and place. Lengths were based on a king’s arm, barleycorns laid end-to-end, and scratches on granite rods. Bushels were units of volume or weight based on what you measured. A pound varied by as much as 30 percent depending on where and when you weighed something – and if the scales were honest.

All this inconsistency made buying and selling goods tricky enough that in 1789 the U.S. Constitution gave Congress the power to fix the “Standard of Weights and Measures.” Today, we take for granted that a pound or a meter or a second is the same everywhere. But how we use those basic measurements for a wide variety of tasks is still a work in progress.

Backpacking product standards: Montage of backpacks

Montage of backpack photos from Backpacking Light reviews.

Example: Backpack Volumes

Have you ever wondered why a 50-liter (3,000 cubic inch) backpack from one company seems much larger than a 50-liter backpack from another? If you have a certain volume of gear, food, and water to carry, you want to know if all of it will fit inside. Simply multiplying the height by width by depth doesn’t work when measuring the volume of an amorphous bag of fabric, especially with extension collars and pockets that change shape depending on how much you stuff inside the main compartment.

Roger Caffin found disturbingly wide differences between claimed and measured volumes in his 2010 Lightweight Internal Frame Packs market survey. A couple of BPL forum threads (here and here) even wandered down the rabbit hole of backpack volume measurements.

And yes, there’s been a standard for that since 2001: ASTM F2153 “Standard Test Method for Measurement of Backpack Capacity.” However, too many pack makers, mostly in the United States, ignore or take liberties with that standard. It’s so widely abused and misunderstood that Philip Werner at Section Hiker proposed measuring pack capacity in beer cans. It was an April Fool’s Day joke, but not without its merits.

I’ll dig into the ASTM standard and why it’s not meeting consumer needs in a future column.

Planned Columns

Over the next year, I plan to write about these topics and others.

Sleeping Bag Temperature Ratings

You’ve probably seen sleeping bags advertised as good to “32 degrees” (Fahrenheit) or “0 degrees” (Celsius) and wondered how they came up with that number. Thanks to ISO 23537, commonly known as the EN rating, we have a consistent way to measure and report those numbers. But how realistic is it? Which gear makers test according to that standard? What do the others use instead? I’ll explain what’s in the standard, how different manufacturers assign temperature ratings to bags and quilts, and why marketing makes a confusing standard even more muddled.

Interviews with Product Testers

If you’ve weighed every piece of gear you own to the nearest gram, you’ve taken the first step down the path of independent product testing. Some backpackers have gone much further down that trail, buying commercial test equipment, or designing and building their own measurement rigs. I’ll interview these independent investigators to find out what drives them to make these investments, what they’ve learned, and what other backpackers should know.

Tent Flammability Standards

In the mid-20th century, deadly tent fires spurred the development of the Canvas Products Association International “Specification for Flame-Resistant Materials Used in Camping Tentage.” Compliance with CPAI-84 became a legal requirement for tent sales in several states, including California. But the materials used to comply with those laws created new and serious problems.

Plus, tent fabrics and designs have changed a lot over nearly four decades. I’ll investigate what’s in that standard, why it went wrong, and how the industry is slowly fixing the problems or working around them.

Product Designer Interviews

In theory, the people who design backpacking gear for sale should follow all the applicable standards. In practice, those standards conflict with other design decisions, and sometimes the standards lose. I plan to interview product designers for a peek inside the process and how standards affect what you can buy.

Headlamp and Flashlight Performance Standards

More than a decade ago, the flashlight industry developed ANSI FL 1, a standard for consistently measuring brightness, beam distance, run-time, and other parameters. Yet some headlamp and flashlight makers grossly exaggerate those numbers, while most retailers simply regurgitate the values, knowing they are wrong. I’ll discuss what’s in the standard, how it was developed, and why it failed.

Send Your Ideas

As far as I know, no other publication consistently covers backpacking standards and testing. Yet, we see standards abused or ignored by companies in ways that often confuse and misinform customers. My primary focus will always be on helping backpackers choose and use products wisely. I hope to be a vox clamantis in deserto, to quote Edward Abbey, a voice crying in the wilderness to make life easier for gear purchasers.

Backpacking product standards: Ideas Noun BPL

Got ideas for the Standards Watch column? Drop them in the comments section or send me via a BPL private message.

I’ve already found about 140 standards that could apply to backpacking equipment and more than a dozen standards development groups. At one or two columns per standard or group, I better get to work!

You can help. Let me know which backpacking standards have problems or which ones are missing. Send questions like, “I’ve always wondered why…?”

If you’ve designed or tested products using standards or participated in backpacking standards development, let’s talk!

Post your comments below or drop me a BPL private message. I want these columns to help you make better gear choices.

Related Content

  • Stovebench: A Stove Testing Protocol for Comparing the Performance of Backpacking Stoves

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  • Author
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  • Sep 5, 2020 at 7:45 am #3674798
    Backpacking Light
    Admin

    @backpackinglight

    Locale: Rocky Mountains

    Intro to a monthly column that explains important backpacking product standards, interviews key people, and analyzes industry standards.

    • Standards Watch: Introduction
    Sep 5, 2020 at 8:46 am #3674806
    rubmybelly!
    BPL Member

    @sleeping

    Locale: The Cascades

    Looking forward to your articles Rex. Thanks for taking this on.

    Sep 5, 2020 at 10:57 am #3674814
    Adrian Griffin
    BPL Member

    @desolationman

    Locale: Sacramento

    Sorely needed. For backpacks, what I call pocket waste affects the usable volume. My zPacks Arc Blast (55 liters, plus about 3 liters for the add-on side pockets) seems nearly as big as my Jansport Carson 80. The reason is that the Carson has 6 pockets, a large lid, and a sleeping bag compartment. The 80 liters is measured assuming all pockets are exactly filled. But gear doesn’t fit this way, so the practical volume is much less. The Arc Blast is one big sack, plus a back mesh pocket, so the practical volume is closer to the stated volume.

    So when you do packs, see if there’s a way to allow for lost space in partly-filled pockets and lids.

    Sep 5, 2020 at 11:08 am #3674820
    PaulW
    BPL Member

    @peweg8

    Locale: Western Colorado

    I’m really looking forward to these articles. I’d love to understand what “standards” are used to determine torso length, shoe size, and tent sizing. Seems like no one uses the same length ruler!

    Sep 5, 2020 at 11:12 am #3674824
    todd
    BPL Member

    @funnymo

    Locale: SE USA

    This sounds great!  Lotsa possibilities here.

    Sep 5, 2020 at 7:54 pm #3674877
    rubmybelly!
    BPL Member

    @sleeping

    Locale: The Cascades

    What I’d really love to see is after your series is over, is that it all get consolidated into a downloadable e-book, preferably in PDF format.

    Sep 6, 2020 at 10:43 am #3674916
    Todd T
    BPL Member

    @texasbb

    Locale: Pacific Northwest

    As a tall guy, I find the most egregious inconsistencies in the labeling of tent dimensions.  It’s not that published dimensions are wrong, it’s that they’re irrelevant.  Floor length and width are utterly meaningless without knowledge of ceiling height at/near the edges.  Peak ceiling height is irrelevant in all cases unless the ceiling is completely flat.  All dimensions have different practical meanings for single- vs double-wall.  Etc.

    I don’t expect this one to be easy.

    Sep 6, 2020 at 4:06 pm #3674946
    Rex Sanders
    BPL Member

    @rex

    Locale: Central California Coast

    Thanks for the encouragement and suggestions. Keep those ideas coming!

    — Rex

    Sep 6, 2020 at 4:24 pm #3674951
    Adrian Griffin
    BPL Member

    @desolationman

    Locale: Sacramento

    Perhaps the length of a tent should not be the full length, but the length for which the internal height is more than 10 inches, 12 inches, or whatever to allow clearance for the sleeper’s head and the toe box of their sleeping bag.

    Sep 6, 2020 at 4:31 pm #3674952
    David Thomas
    BPL Member

    @davidinkenai

    Locale: North Woods. Far North.

    How long a coffin can you place in the tent?

    (asking for a friend).

    Sep 6, 2020 at 5:31 pm #3674956
    Roger Caffin
    Moderator

    @rcaffin

    Locale: Wollemi & Kosciusko NPs, Europe

    , I find the most egregious inconsistencies in the labeling of tent dimensions.
    Don’t pick on tents. The same criticism applies to many pack brands for capacity, for some sleeping bags over temp ratings and size, etc.
    It’s a competitive capitalist world with few prizes for honesty. All that matters is the bottom line for the next quarter.

    Cheers

    Sep 6, 2020 at 6:44 pm #3674966
    Todd T
    BPL Member

    @texasbb

    Locale: Pacific Northwest

    , I find the most egregious inconsistencies in the labeling of tent dimensions.
    Don’t pick on tents.

    Don’t pick off the most important part of my sentence:  “As a tall guy…”  :-)

    The same criticism applies to many pack brands for capacity, for some sleeping bags over temp ratings and size, etc.
    It’s a competitive capitalist world with few prizes for honesty.

    The (dis)honesty of marketing is a separate matter, I think.  Even if all marketing were forthright and factual, there would be value in standards that allow meaningful comparison across manufacturers and products.

     

    Sep 10, 2020 at 6:23 pm #3675612
    Max L.
    BPL Member

    @mlehman

    I’m relatively new around here, but this sounds like it will be a very interesting series. I love hearing the hows and whys of designs.

    Sep 19, 2020 at 4:10 pm #3676814
    Fred A
    BPL Member

    @bfp

    It may be interesting to take a deep dive into waterproof/breathable rain parkas and the process of “Wetting-Out”.  Is there a way to differentiate captured perspiration versus rain migrating through the material?  This may help to define “Wetting-Out” in quantifiable terms to compare rain parkas.

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