Natural fiber clothing is easy to want and hard to buy. Brands say cotton on the product name and hide the 28 percent nylon in the details tab. Sweaters photographed as wool turn out to be 45 percent acrylic. So I read the composition line on 144 pieces across 18 brands and kept a list of what passes.
The standard was plain. Cotton, linen, hemp, wool, silk, cashmere and leather pass. Polyester, nylon, acrylic and elastane above trace amounts fail. Where a brand didn’t print a percentage, I say so.
This post contains commissionable links. Images were made with AI from the brands’ own product photos.
Why natural fiber clothing is worth the tag reading
Natural fibers breathe, take dye differently and age in a way synthetics don’t. A cotton chore coat softens. A hemp tee gets better after ten washes. A merino crew regulates heat in a way a poly fleece can’t. The trade is care: cotton wrinkles, linen creases, wool needs hand washing. If you live somewhere warm, the breathing matters more than the ironing.
The other reason is longevity. Loopwheeled cotton from Merz b. Schwanen or 12 oz corduroy from Taylor Stitch is built to outlast the trend cycle. You buy fewer things.
The brands that pass, sorted by what they do best
Tees and henleys
Jungmaven’s Baja Tee is 55 percent hemp and 45 percent organic cotton at 7 oz, $62. Merz b. Schwanen’s 214 Loopwheeled Relaxed Fit Tee is organic cotton knitted on 1920s machines in Germany, about $127. Alex Crane’s Sun Tee is 100 percent knit linen from Normandy flax, $78. Save Khaki’s American Jersey Pocket Tee is US Delta cotton knitted in Los Angeles, $75. Wythe’s Cotton Henley is 100 percent cotton at $148. Corridor’s Waffle Henley is 100 percent cotton waffle thermal, $145.
Casual shirts
Knickerbocker’s Beefy Cotton Oxford is 100 percent cotton, 6.5 oz, woven in Portugal, $195. Wythe’s Washed Madras Workshirt is hand-spun and hand-woven cotton, $198. Alex Crane’s Ola Shirt is European linen, $158. Alex Mill’s Mill Shirt in Washed Chambray is 100 percent cotton, $155. Sid Mashburn’s Madras Sport Shirt is 100 percent cotton, handwoven in India, $145.
Overshirts and chore coats
Wythe’s Washed Flannel Workshirt is 100 percent cotton brushed both sides, $188. Corridor’s Misha Overshirt is 100 percent cotton 10 oz twill, $295. Taylor Stitch’s Ojai Jacket is 12 oz 100 percent organic cotton corduroy, $248. Alex Mill’s Garment Dyed Chore Jacket is 100 percent cotton canvas, $225. Save Khaki’s Wide Wale Corduroy Trucker is 100 percent cotton 8-wale, $240. Jungmaven’s Olympic Jacket is 55 percent hemp, 45 percent organic cotton, $242. Portuguese Flannel’s Stalia is cotton flannel, about $161.
Knits
Wythe’s Highland Cableknit Sweater is 100 percent Andean highland wool, $248. Alex Mill’s Winston Crewneck is 100 percent fine merino, $178. Knickerbocker’s Ivy Cotton Sweater is 100 percent cotton, $245. Luca Faloni’s Crew Neck in 2-Ply Cashmere is $375. Taylor Stitch’s Eastmoor Sweater is 100 percent RWS wool, $178.
Pants
Wythe’s Cotton Linen Twill Chino is 65 percent cotton, 35 percent linen, $228. Corridor’s Wide Twill Pant is 100 percent cotton, $265. Knickerbocker’s Canal TwillForm Pant is 100 percent cotton gabardine, $265. Alex Mill’s Flat Front Chino in Vintage Wash is 100 percent non-stretch cotton, $175. Save Khaki’s Weekend Chino is 100 percent cotton twill, $180. Casatlantic’s TAZA Cotton Trousers are about $201.
The pieces that failed, and why
This is the part most roundups skip. Taylor Stitch’s Shore Jacket carries 28 percent nylon and the Portola carries 15 percent. Mollusk’s Fisherman sweater is 45 percent acrylic and its Shaggy Pullover is 100 percent polyester. Wax London’s fluffy wool knits are 40 percent nylon and the Naples polos are 14 percent elastane. Knickerbocker’s Amos Alpaca cardigan is up to 28 percent polyamide. Corridor’s Heavy Twill Trouser is 98 percent cotton and 2 percent elastane. Wythe’s jacquard crews are 26 percent acrylic. Octobre Editions’ Lellan, Lars and Stone are wool-poly blends.
None of these are bad clothes. They just aren’t natural fiber clothing, and the product name won’t tell you.
How to read a composition line
Start with the details or fabric tab, not the product name. A “corduroy jacket” can be cotton or a cotton-poly blend. Look for a percentage. If there isn’t one, the brand is either 100 percent one fiber and says so in prose, or it doesn’t want you to know. Two percent elastane in a pant is a judgment call; I skip it because it changes how the fabric ages, but plenty of people won’t mind. Anything above 10 percent synthetic in a knit will pill differently and hold heat differently, and you will feel it.
Reading the sewn-in label in ten seconds
The sewn-in label is the one place a brand can’t stay vague. FTC rules require fiber content, country of origin and the responsible company, by name or RN number.
- Read the first line. Fibers appear by weight, largest first, with percentages.
- Look for other fiber. Fibers under 5 percent usually go under that name, unless they do a job, like spandex for stretch.
- Know the aliases. Elastane is spandex, viscose is rayon, and Lycra is a spandex trademark.
- Trust 100 percent. A blend’s numbers can be off by 3 percentage points, but a single-fiber label gets no tolerance.
- Read the hangtag last. It can praise one fiber and skip the rest, as long as it points you to the label.
Online, the rules are looser, which is how cotton blend hides things. A product page that names a fiber must list them all, but not the percentages. So cotton and polyester tells you cotton leads, not whether it is 51 percent or 95. The FTC is strict about one name: a label can’t say Pima blend without the Pima share.
Fiber by fiber: what each does well and where it fails
Here is how each passing fiber performs, where it fails, how it ages and how to care for it.
Cotton
Cotton breathes and softens with every wash. Heat is its weak spot, since hot water and a hot dryer shrink it. Maytag says even preshrunk cotton can lose 2 to 5 percent over time. Wash it cold and hang it to dry.
- Pima is an extra-long staple cotton first developed at a USDA farm in Arizona. A label can say 100 percent Pima only if all the cotton is Pima.
- Supima is the trademark for American-grown Pima. Its fibers average about 1.5 inches, against about 1 inch for regular cotton. I own Buck Mason’s Pima Classic Tee, listed as 100 percent Supima at $48.
- Organic means grown without synthetic pesticides, herbicides or GMOs. A GOTS organic label requires at least 95 percent certified organic fiber.
Linen
Linen is spun from flax stems. It lets air through and absorbs sweat fast, so it is the hot-weather pick. It wrinkles easily, and a hard spin cycle sets creases, per the European flax trade group. It softens and builds a patina with every wash. Wash it at 30°C, about 86°F, and dry it in the shade.
Hemp
Hemp is strong enough to have long been used for rope and ship sails. It breathes, wicks moisture and starts out crisp, then softens with every wash, as the hemp shirts guide shows. Blending it with cotton, as Jungmaven does at 55/45, makes it smoother from day one. Jungmaven says to wash cool and tumble dry low, since line drying can stretch heavier pieces.
Wool and merino
Wool resists odor, stains and wrinkles, so it needs less washing. Merino is the fine end, and its fibers bend against skin instead of poking it. Hot water is its weak spot, because heat can shrink it out of shape. Fold knits rather than hang them, as Woolmark advises.
Cashmere
Cashmere is the fine undercoat of the cashmere goat. US law allows the name only for fibers averaging 19 microns or finer. Its fibers are shorter than wool’s, so it pills, mostly over the first 15 to 20 wears, per Luca Faloni. A cashmere comb removes it. Hand wash it in lukewarm water, dry it flat and store it folded.
Silk
Silk is a protein fiber spun by silkworms, and one of the strongest natural fibers. It feels cool in heat and warm in cold. Sun weakens it, sweat and saltwater spot it, and wet silk can lose up to 20 percent of its strength. Many silks need dry cleaning, so treat it as a rotation piece.
Fabric weight: ounces, gsm and what the numbers mean
Weight tells you more than any adjective on a product page. Brands quote it in ounces per square yard or grams per square meter, called gsm. One ounce per square yard is about 34 gsm, per NIST’s conversion tables. Corridor lists the Misha at both 325 gsm and 10 oz, the same weight rounded.
| Garment | Typical weight | In gsm | Examples checked |
|---|---|---|---|
| Tee | 4 to 9 oz | 135 to 305 | Buck Mason Pima Classic Tee, 140 gsm; Corridor Garment Dye Tee, 9 oz |
| Shirt | 4 to 6.5 oz | 135 to 220 | Save Khaki Work Shirt in Cotton Hemp, 4 oz; Knickerbocker Beefy Cotton Oxford, 6.5 oz |
| Overshirt | 6 to 10 oz | 205 to 340 | Jungmaven Beach Jacket, 6.3 oz; Corridor Misha Overshirt, 10 oz |
| Chore coat | 8 to 14.5 oz | 270 to 490 | Taylor Stitch Ojai Jacket: 8 oz twill, 12 oz corduroy, 14.5 oz moleskin |
| Jeans | 10 to 14 oz | 340 to 475 | AG Tellis, 10 oz; Taylor Stitch Democratic Jean, 14 oz |
The chore coat guide explains why 10 to 12 oz suits most of the country. In a hot climate, shop the light end of each row.
When a little stretch is fine, and when it isn’t
Stretch is everywhere now, especially in denim. A 2018 textile engineering study put typical elastane content at 1 to 5 percent. Faherty’s Stretch Terry Corduroy Workshirt is 98 percent organic cotton and 2 percent elastane. AG’s Tellis 360 jean is 96 percent cotton and 4 percent polyurethane, the polymer spandex is made from.
The tradeoff shows up in the wash. A second 2018 study washed denim with 1 to 4 percent elastane. Permanent stretch grew with each wash, and recovery dropped sharply after five. The first study also found more elastane meant weaker denim.
Rigid denim has no elastane to wear out. Taylor Stitch’s Democratic Jean in Mid Wash Organic Selvedge is 14 oz, 100 percent organic cotton, at $178. Stretch earns its place in a travel pant. I own AG jeans and Faherty’s stretch terry five-pockets, so I’m no purist. Faherty’s numbers for the terry add up to 79 percent cotton, plus rayon, lyocell and 4 percent spandex. That is honest labeling, but not natural fiber clothing.
Care that makes natural fibers last
- Wash cold. Heating water takes about 90 percent of a washer’s energy, per ENERGY STAR, and cold cleans most loads.
- Hang dry, with one exception. Alex Mill’s chambray shirt and Knickerbocker’s Canal pant say line or hang dry. Jungmaven says heavier hemp should tumble dry low, because line drying can stretch it.
- Rest wool. Woolmark says to give it 24 hours between wears so the fiber can spring back, and to brush it after.
- Store it clean. Moths go for food and sweat stains, so clean wool before it goes into a sealed bin.
- Use cedar, but don’t count on it. Its oil can kill small moth larvae but not large ones. It also loses that power after several years, per UC’s pest management program.
Frequently asked questions
What is the best natural fiber for hot weather?
Linen first, then hemp, then lightweight cotton. Linen and hemp wick and dry fastest. Alex Crane and Jungmaven are the two brands here built around those fibers.
Is hemp clothing soft?
After a few washes, yes. Jungmaven’s 7 oz hemp-cotton jersey starts slightly crisp and softens fast. It holds up better than cotton over years of washing.
Which brand is 100 percent natural fiber across the whole line?
Alex Crane comes closest: linen, organic cotton and merino, nothing else. Merz b. Schwanen and Jungmaven are close behind. Every other brand here has at least one blend to avoid.
Is stretch in pants a deal breaker?
For this list, yes. Two percent elastane changes drape and recovery over time. If you want stretch, Faherty’s stretch terry is the honest version: majority cotton, and it says so.
Is 100 percent cotton better than a blend?
For most clothes, yes. Pure cotton breathes and softens with washing. The trouble with a blend is what you can’t see: online, a brand can list cotton and polyester without percentages. Cotton blended with linen or hemp is different, because it is still all natural fiber.
Does hemp clothing shrink?
A little, mostly from heat. Unwashed hemp fabric can shrink 5 to 15 percent, says fabric seller Hemp Traders. Finished pieces are often washed first. Save Khaki calls its hemp work shirt pre-shrunk, and Jungmaven garment-dyes its Olympic Jacket. Wash cool and tumble dry low, as Jungmaven advises.
Is merino wool itchy?
Rarely. Itch comes from coarse fibers over about 30 microns pressing on skin. Woolmark calls it mechanical irritation, not an allergy. Merino is finer than other wools, and its fibers bend instead of poking. If a sweater itches, its wool is likely coarser than merino.
Compositions and prices as shown on each brand’s site on October 6, 2026.
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