The Cotton That Earns Its Name
It started in the Arizona desert in 1900, took its name from the people who grew it, and today accounts for about 1% of the world’s cotton. This is the story of Supima, and why it is in what we build.
The word cotton on a label tells you very little. Supima tells you a great deal: where the fiber was grown, who grew it, and whether anyone can actually prove it. That is why it is in our tees, and why it will be in more of what we make.
Not All Cotton Is Cotton
There are hundreds of varieties of cotton grown on six continents. Some fibers measure less than an inch long. Some are blended with synthetics and still labeled cotton. The word is a category, not a standard. It tells you what the fabric is made from, not how well it will hold up, not where it came from, and not who grew it.
Supima is different in every one of those ways, and the reason why goes back more than a century, to a government breeding station in the Sonoran Desert.
A Desert, a Shortage, and a Seed
Around 1900, the United States Department of Agriculture began breeding trials for extra-long staple cotton at Sacaton, Arizona, southeast of Phoenix. The species was Gossypium barbadense, the same family behind Sea Island and Egyptian cotton, and at the time the American crop went by the name American-Egyptian cotton.
The motive was not luxury shirting. It was industry. Long, strong fiber was needed for tire cording, and when the First World War and a cotton embargo cut off foreign supply, a domestic source of premium fiber stopped being a preference and became a strategic necessity. Some of that early American ELS crop went into Goodyear tires.
By 1908 the USDA had moved its barbadense program onto the Gila River Indian Reservation at Sacaton, and the trials were carried out on lands of the Pima people, the Akimel O’odham, who cultivated the crop on the experimental farm. When the resulting cotton needed a name, it was given theirs. That is the whole origin of the word Pima on a garment label: it is not a place, not a brand, and not a marketing invention. It is an acknowledgment.
“In recognition of their participation, the name Pima was adopted to identify the cotton and the first cultivars produced there.”
— On the USDA trials at Sacaton, ArizonaThe story turns again in 1951, when breeders developed a seed producing an ELS cotton of noticeably superior quality, known for its silkiness. Three years later, in July 1954, growers from Arizona, New Mexico, and Texas founded the SuPima Association of America. They were under pressure from two directions at once: cheaper Egyptian and foreign cottons on one side, and the rise of synthetic fibers on the other.
The name they chose was a contraction of Superior Pima. It was later shortened again to Supima. The association trademarked it, set the standards behind it, and has spent seventy years defending the line between cotton that meets those standards and cotton that does not. Supima remains a non-profit trade association running quality assurance and research alongside the trademark.
“Only 1% of the world’s cotton is Supima. Grown and cultivated by just over 500 family farms, only in the USA.”
— Supima Brand Guidelines, The Supima AssociationThat rarity is not an accident. Supima can only be grown in a narrow geography: California’s San Joaquin Valley, Arizona, New Mexico, and Texas, where the climate provides what Gossypium barbadense requires. You cannot grow it anywhere else in the world and call it Supima. The trademark guarantees that. When you see the SUPIMA® mark on a garment, the fiber was grown in this country, on American farmland, by American farmers.
The Science of the Fiber
The extra-long staple designation matters because fiber length is one of the primary determinants of fabric quality. Standard upland cotton, the variety used in most commercial apparel, produces fibers averaging around one inch. Supima fibers average over 1.5 inches.
Longer fibers spin into finer yarn. Finer yarn creates a smoother, denser fabric surface, and a smoother surface resists pilling. Longer fibers also mean stronger individual strands: Supima is twice as strong as regular cotton, which is why these garments hold their form and their weight through repeated washing.
Color is the other place fiber length shows up. Supima’s finer, longer fibers absorb dye with greater depth and consistency than shorter staple cotton, so colors hold longer and fade more evenly.
An open cotton boll showing the long, dense fiber locks characteristic of Pima cotton. Pima bolls produce three distinct locks of fiber, a key difference from standard upland cotton.
500 Family Farms
Supima cotton comes from more than 500 family farms across the American West and Southwest, most concentrated in California’s San Joaquin Valley, with the remainder in Arizona, New Mexico, and Texas. They are multigenerational family businesses rather than distant industrial operations.
Pima is more demanding to grow than upland cotton. It needs specific conditions and precise timing, and it yields less per acre. Choosing it means choosing the growers who take that on, in the same regions where the USDA ran those first trials.
The Supima Story: American-grown, from seed to stitch. Produced by the Supima Association.
Traceable to the Farm
A trademark is only as good as its enforcement, which is where the modern chapter comes in. The Supima Association partners with Oritain, a scientific origin verification company, to establish an origin fingerprint for genuine Supima cotton.
Every plant fiber naturally absorbs chemical elements and isotopes from the soil, water, and environment where it grows. That creates a molecular signature which cannot be removed through processing, spinning, dyeing, or washing. Oritain analyzes those isotope profiles and stores the fingerprint in a database, so a sample pulled anywhere in the supply chain can be tested against it. Substituted or blended fiber fails. Genuine Supima passes.
“Every plant fiber contains a unique profile from where it was grown and is never removed through wearing and washing. Our technology enables us to detect this unique molecular profile and certify exactly where the cotton came from, right down to the individual farm where it was grown.”
— The Supima Association, on Oritain Origin Fingerprint TechnologyWhat Our Cotton Carries
Every cotton piece in our line begins with extra-long staple Supima grown in California. We chose it for how it wears and for what stands behind it, and to us those have never been separate questions.
Four marks sit behind that cotton. Each answers something different, and together they cover the questions worth asking about anything you put on your body every day.
What stands behind our cotton
SUPIMA® Trademark
The fiber. 100% American-grown extra-long staple Pima, licensed and controlled by the Supima Association, with Oritain origin verification behind it. A third-party mark, not a self-applied claim.
OEKO-TEX® Standard 100
What sits against your skin. Tested against a list of more than a thousand harmful substances, including heavy metals, formaldehyde, and residues left behind by dyeing. Passing means nothing was found above the standard’s limits. No toxic dyes. No formaldehyde.
Fair Trade Certified™
The people. Fair Trade standards set requirements for wages, safe working conditions, and worker representation, so the hands that made your shirt were treated fairly.
Wind Power
The energy. Wind-powered production stands behind these pieces.
Both tees below are six ounces, 100% American-grown Supima in a 28/1 jersey knit, pre-shrunk, with a tear-away label and a double-needle neck rib.
LLRULE Supima Cotton
Pismo Cotton Tee
6 oz 100% American-grown SUPIMA®
28/1 jersey knit · extra-long staple
OEKO-TEX® Standard 100 · no toxic dyes
Shown in Cloudy Blue · $65
Pima cotton in the field. Supima is grown across California, Arizona, New Mexico, and Texas, and nowhere else in the world.
LLRULE Supima Cotton
Daytripper Pima Cotton Tee
6 oz 100% American-grown SUPIMA®
28/1 jersey knit · extra-long staple
OEKO-TEX® Standard 100 · no toxic dyes
Shown in Heather Grey · $54
Part of Our DNA
American-grown cotton is part of our DNA, and it will only keep growing across our product lines. It is what we do, and we are glad to be part of the movement.
It makes me proud as an owner and founder to be putting out products that are good for the people who wear them, good for the planet, and good for building our communities. It feels good to do what is best for ourselves and for the world we live in, and I am glad we found the importance, and a deeper sense of the necessity, of doing it this way.
Everything You Put In and On Your Body Matters
We drink our green juices. We eat the vegetable and fruit smoothies. We drink good water and we move with purpose to get the blood circulating, because we know beyond a shadow of a doubt that everything we put in and on our bodies matters most.
Clothing is the part people forget. It is against your skin every hour of the day. That is the whole reason these standards matter to us, and the whole reason we care where the fiber was grown and who grew it.
The Full Line
The Pismo and the Daytripper are where our Supima line starts. You can see the rest of what we build in cotton in Mens Cotton and Womens Cotton.
