WYR · Material Specification
DOC WYR-FAB · REV 02 · 2026
Our Fabric

It Starts With the Fabric

We make our shirts from long-staple Giza cotton, specifically Giza 94 & 95, two of the named cotton varieties grown in Egypt's Nile Delta.

Fiber
Long-staple Giza (Giza 94 / 95)
Origin
Nile Delta, Egypt
Staple length
32-38 mm vs 22-27 commodity
Bundle strength
32-50 g/tex top-decile global cotton
Composition
95% Organic Egyptian Giza cotton · 5% elastane
FIG.00 · Long-staple Giza jersey, knit loop structure

"Giza" isn't a marketing term, it's the official naming system for Egyptian cotton, indicative of the spec. Most proclaimed "Egyptian cotton" sold is neither Egyptian nor real Giza. Ours is, hand-picked in the Nile Delta and authenticated by the Cotton Egypt Association, sourced directly from our partner farms.

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§01
The Comparison

How the fabrics compare.

Tap a column to isolate it against Giza · → scroll

Organic Giza Cotton Polyester Poly-cotton Standard cotton Bamboo
Fiber Natural, 32-38mm Plastic, petroleum Plastic + cotton Natural, 22-27mm Rayon, from pulp
Bundle strength 32-50 g/tex n/a (filament) Low at cotton 20-25 g/tex Weak when wet
Made how Spun from long fiber Melt-spun petroleum Plastic blended w/ cotton Spun from short fiber Pulp cooked in carbon disulfide, lye, acid
Initial Hand Feel Soft, smooth Slick, synthetic Average Stiff until washed Soft, silky
After 50 washes Softer, holds shape Pills, holds odor Pills at the cotton Pills, fuzzes, thins Weakens, thins
Breathable Yes No Partly Yes Yes
Holds odor No Up to 3× more More Low Low
Microplastics shedding No Every wash Every wash No No
Raw fiber cost $$$$$ $ $$ $ $$$
Longer fiber, fewer flaws
Giza runs 32-38mm, up to 73% longer that standard cotton. Longer fiber means fewer loose ends to prevent pilling and fuzz, and stronger fibers so it won't thin out.
Standard Cotton vs. Giza Cotton
Standard cotton often relies on chemical treatments for softness, but once those treatments fade, the difference is clear.
Polyester is plastic
A synthetic fiber derived from petroleum. It sheds microplastic fibers during washing, which researchers have detected in human blood, brain, and reproductive tissues.
The Cost of High-Grade Cotton
Giza cotton costs up to 5X more than standard cotton, polyester, or bamboo. Other brands spend less on the material & more trying to convince you it's premium.
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§02
The Fiber

Staple length is the number that decides everything.

Staple length is the length of a single cotton fiber, the most important factor in how a shirt feels and how long it lasts.

FIG.02 · Single spun thread, simulated Long-staple Giza
◂ Commodity 22-27mmGiza 32-38mm ▸
36mm
Staple length
38g/tex
Bundle strength
5%
Short-fiber index
2%
Pill risk

Drag the thumb. Shorter staple gives weaker yarn, more short-fiber waste, higher pill risk. Our Giza runs 32-38mm. Staple, bundle strength & short-fiber index per Egypt Cotton Research Institute / USDA HVI classing.

  • Giza fiber: 32-38mm. Commodity cotton: 22-27mm. Up to 73% longer, hand-picked to keep it intact.
  • Longer fibers need less twist to hold together, so the yarn is softer, smoother, and less susceptible to pilling.
73%
longer fiber than commodity cotton (38mm vs 22mm)
32+
g/tex bundle strength, top decile of global cotton
5%
short-fiber index, under half of commodity's 12%+

Why Giza is scarce.

FIG.04 · Nile Delta, where Giza growsORIGIN

Giza cotton grows only in the Nile Delta, silt-rich soil, around 200 sunny days a year, humidity that lets the fiber reach full length without breaking. It yields less per acre and is hand-harvested, so it costs several times commodity cotton.

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§03
Why No Polyester

Polyester is plastic, worn against your skin.

PET flakes → synthetic thread · cold clinical light
FIG.03 · PET feedstock to melt-spun fibreCLINICAL
  • Microplastics. Up to ~496,000 microfibers shed per wash. Microplastics are now detected in human blood, arteries, and reproductive tissue. "Recycled" polyester sheds 55% more.
  • Heat & charge. It traps heat against the body and builds static, both shown to disrupt the testicular environment in the same clinical work.
  • Odor. Its lipophilic surface soaks up sebum and feeds odor-causing Micrococci that water can't rinse out, "permastink" by design.
more body odor than cotton, in a Ghent University smell-panel study
496
thousand microfibers shed in a single wash cycle
5
polyester traps body heat making the air next to your skin up to 5°F hotter than natural cotton

We don't use polyester. Ever. Not recycled, not as a blend.

§04
The Supply Chain

Every stage, and the standard behind it.

01 · Grown

Nile Delta farms

No synthetic pesticides, synthetic fertilizers, or GMO seed.

02 · Spun

Long-staple yarn

Selected for softness and strength before it's ever knit.

03 · Knit & dyed

To our spec

No toxins or harmful dyes. No chlorine bleach, no banned chemicals.

04 · Finished

Built to last

Treated to resist pilling and hold its feel through washing.

91%
less water than conventional cotton (180 vs 2,120 m³ / tonne)
46%
lower global-warming potential per tonne of fiber
0
synthetic pesticides, synthetic fertilizers, or GMO seed

Organic vs conventional cotton LCA per Textile Exchange. Conventional cotton accounts for ~16% of global insecticide use; ours, none.

§05
Our Standards

Behind the "organic" label

Our fabric is produced in accordance with the strictest organic textile standards. Our partner fabric supplier is certified, audited, and adheres to that strict standard across the fabric, fiber, yarn, knit, dye, and finishing process.

  • Premium organic grade cotton requires a minimum of 95% certified organic fiber which we maintain.
  • No banned chemicals, formaldehyde, azo dyes, heavy metals, chlorine bleach.

Our cut-and-sew work is done by independent local facilities that we trust & that employ skilled craftsmanship required for our quality standards.

FIG.05 · Cut-and-sew, local workshopCRAFT
§06
Why 5% elastane

The Science behind the Stretch

Elastane functions only to provide 4-way stretch and shape recovery, so the shirt doesn't bag at the knees and elbows. It's spun into the core of the yarn and wrapped in cotton, so it never touches your skin, the feel, breathability, and softness are 100% from the cotton.

95% Giza cotton
5% elastane
Maximum organic fiberWith structural stretch

The 95/5 split is the exact threshold allowable to maintain the highest grade "organic fabric" designation under organic textile standards. At 5%, we believe that is the perfect threshold to maintain flexibility & wearability while retaining the fabric's natural feel.

GOTS "organic" label grade requires ≥95% certified organic fibre; elastane permitted, virgin polyester and acrylic prohibited. GOTS Version 8.0 (1 March 2026), global-standard.org.

FIG.06 · Four-way stretch and recoverySTRETCH
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Wear It

Read the spec. Then feel it.

Every claim here is on every shirt we make.

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FIG.07 · The collectionPRODUCT
Sources

Fiber length & yarn strength: Textile School; cottongins.org (2026); AATCC; J. Cotton Research. · Giza 94/95 classification: Egypt Cotton Research Institute; USDA FAS. · Polyester odor: Callewaert et al., Applied & Environmental Microbiology, 2014; McQueen 2007. · Microplastics in tissue: University of New Mexico, Nature Medicine 2025; Toxicological Sciences 2024. · Recycled polyester: Changing Markets Foundation, 2025 (Çukurova University). · Bamboo / FTC: US FTC textile labeling enforcement. · GOTS: Global Organic Textile Standard v8.0.