What is pima cotton, and what may a label legally call it?
By Yash Malviya·
Pima is the common name for extra long staple cotton, a USDA category defined partly by how it is ginned. The FTC has no separate pima rule, which is exactly why some labels are misleading without being illegal.
What pima cotton actually is
Pima is the common name for extra long staple cotton, usually shortened to ELS. USDA's Agricultural Marketing Service refers to extra long staple cotton as the cotton also known as pima, and its Special Competitive Provisions for it began in the autumn of 1999.
The federal definition is more specific than the marketing suggests, and more procedural. Regulation at 7 CFR 1427 defines ELS cotton as cotton produced in the United States and ginned on a roller gin, covering named varieties including American-Pima.
That is worth a pause. Part of what makes cotton ELS in the eyes of the regulation is not only the plant but how it is processed. Roller ginning is gentler than the saw ginning used for shorter cotton, and it is used precisely because long fibres survive it better.
Why staple length matters
Staple is the length of the individual fibre. Longer fibres can be spun into finer, stronger, smoother yarn with fewer exposed ends, which is where the qualities attributed to pima come from: a softer hand, less pilling, better durability.
USDA maintains official staple standards for American Pima, covering representative lengths such as one and a half inches. Those standards exist because length is graded and traded as a commodity specification, not as a marketing adjective.
The honest caveat is that fibre length is one input among several. Yarn count, construction, finishing and the quality of the make all affect how a finished garment feels. A long fibre poorly spun into a cheap fabric will not outperform a well-made shorter-staple cloth.
Pima, Supima and Egyptian: three different kinds of word
These get used interchangeably on product pages and they are not the same type of claim.
Pima is a fibre description. It names a category of cotton.
Supima is a trademark. USDA describes it as a trademark of an ELS cotton, commonly referred to as American Pima cotton, produced in Arizona, New Mexico and west Texas, administered by a producer association. It is a licensing programme, which means it is a claim with an owner who can police it.
“A fiber trademark or other term must not be used to imply the presence of a fiber that's not actually in the product.”
Egyptian cotton is a geographic claim, and it is the loosest of the three. It refers to where cotton was grown, not to a staple length, and nothing about the phrase guarantees ELS fibre.
What the FTC does and does not say
Here is the part that explains most misleading labels: the FTC has no pima-specific rule. Its general cotton labelling guidance applies, under the Textile Fiber Products Identification Act.
That general guidance is still strict about one thing. For a product containing more than one kind of cotton, the FTC states that a content statement claiming the product is made of only one type of cotton is not acceptable. Its worked example is a sheet that is 65 per cent pima and 35 per cent upland, where the acceptable wordings are 65% Pima Cotton, 35% Other Cotton or 100% Cotton (65% Pima Cotton).
On trademarks, the FTC is blunt: a fiber trademark or other term must not be used to imply the presence of a fiber that's not actually in the product. An invented brand name that sounds like pima cannot be used on a product without it.
The towel example, which is the one to remember
The clearest illustration in the FTC's guidance involves a towel where only the loops are pima and the ground is a different cotton.
The FTC says a label reading 100% Pima Cotton, or simply Pima Cotton, would not be acceptable for that towel. What is acceptable is 100% Cotton, 100% Pima Cotton Loops, provided the statement is truthful.
That single example is the most useful test you can apply in a shop. Does the label say the product is pima, or does it say a component is? Those are different claims, and the FTC treats them differently.
How to read a pima label
Four questions, all answerable from the label itself.
Does it name a percentage? A blend must disclose the share.
Does it qualify which part? Loops, facing, pile. A qualified claim is a narrower claim.
Is it a trademark or a fibre name? Supima is licensed and policed. Pima alone is a description.
Is the claim geographic? Egyptian names a place, not a staple length.
For the general rules behind all of this, including the thresholds at which a fibre must be disclosed, we have covered how to read a clothing fiber content label. The organic cotton label is a separate claim again, governed by different machinery entirely.
Frequently asked questions
What is pima cotton?
It is the common name for extra long staple cotton, usually shortened to ELS. USDA's Agricultural Marketing Service refers to ELS cotton as the cotton also known as pima. Federal regulation defines ELS partly by process rather than only by plant: 7 CFR 1427 describes it as cotton produced in the United States and ginned on a roller gin, covering varieties including American-Pima. Roller ginning is gentler than saw ginning and is used because long fibres survive it better.
What is the difference between pima and Supima?
Pima is a fibre description. Supima is a trademark. USDA describes Supima as a trademark of an ELS cotton, commonly referred to as American Pima cotton, produced in Arizona, New Mexico and west Texas, administered by a producer association. The practical difference is enforcement: a trademark has an owner with an interest in policing misuse, while pima on its own is a descriptive term that depends on general labelling law for its meaning.
Does a pima cotton label guarantee the whole product is pima?
No, and the FTC's own example shows why. For a towel where only the loops are pima and the ground is another cotton, the FTC says a label reading 100% Pima Cotton or simply Pima Cotton would not be acceptable, while 100% Cotton, 100% Pima Cotton Loops would be if truthful. So the test is whether the label claims the product is pima or that a specific component is. Those are different claims.
How must a pima blend be labelled?
The share has to be disclosed. The FTC states that for a product with more than one kind of cotton, a content statement claiming the product is made of only one type of cotton is not acceptable. Its worked example for a sheet that is 65 per cent pima and 35 per cent upland gives two acceptable wordings: 65% Pima Cotton, 35% Other Cotton, or 100% Cotton (65% Pima Cotton).
Is Egyptian cotton the same as pima?
Not necessarily, and the two words do different jobs. Egyptian cotton is a geographic claim about where cotton was grown. Pima describes extra long staple fibre. Cotton grown in Egypt may or may not be ELS, and the phrase on its own carries no staple-length guarantee. Treating the two as interchangeable is one of the more common conflations in bedding and shirting marketing.
Why does staple length matter?
Staple is the length of an individual fibre, and longer fibres can be spun into finer, stronger and smoother yarn with fewer exposed ends. That is the origin of the qualities attributed to pima: softer hand, less pilling, better durability. The caveat worth keeping is that fibre length is one input. Yarn count, fabric construction, finishing and manufacturing quality all affect the finished garment, and a long fibre badly spun does not outperform well-made shorter-staple cloth.
Is there an FTC rule specifically about pima?
No. The FTC's general cotton labelling guidance applies, under the Textile Fiber Products Identification Act, rather than any pima-specific regulation. That absence is why the precise wording of a claim does so much work. The general rules are still enforceable: blends must disclose shares, qualified claims must say what they qualify, and trademarks must not imply a fibre that is not present.
Can a brand invent a name that sounds like pima?
Not if the product lacks the fibre. The FTC states that a fiber trademark or other term must not be used to imply the presence of a fiber that's not actually in the product. An invented brand name engineered to evoke pima on a product containing none would run into that rule. The test is whether the term implies a fibre is present, not whether the term is technically a trademark.
What does roller ginning have to do with it?
It is part of the federal definition rather than a quality claim. 7 CFR 1427 defines ELS cotton as US-produced cotton ginned on a roller gin, so the processing method is written into the regulatory category. The practical reason is that roller ginning handles long fibres more gently than the saw ginning used for shorter cotton, so the length that makes the cotton valuable is preserved rather than broken up.
How can I check a pima claim as a shopper?
Read the label for four things: whether a percentage is given, whether the claim is qualified to a component such as loops or facing, whether the word is a fibre description or a licensed trademark such as Supima, and whether the claim is geographic rather than about staple length. Those four distinctions separate most honest labels from most misleading ones, and all of them are visible on the label itself.
Sources
What each one is, and whose it is.
- 1
Calling It Cotton: Labeling and Advertising Cotton Products, Federal Trade Commission
DocumentationIndependent of the vendor - 2
Threading Your Way Through the Labeling Requirements Under the Textile and Wool Acts, Federal Trade Commission
DocumentationIndependent of the vendor - 3
7 CFR 1427.1202: Definitions (Extra Long Staple cotton), Electronic Code of Federal Regulations
DocumentationIndependent of the vendor - 4
7 CFR 28.304: Original representation of American Pima cotton staple lengths, Electronic Code of Federal Regulations
DocumentationIndependent of the vendor - 5
Cotton Program, USDA Agricultural Marketing Service
DocumentationIndependent of the vendor