Here’s something most men don’t realise: their basics are already some of the most natural-fibre-heavy clothing in retail. While women’s dresses and outerwear are flooded with polyester, the humble t-shirt, oxford shirt, and chino remain stubbornly cotton.

Fibr’s data confirms it. Zara t-shirts average 89.8% natural fibre. Shirts hit 82.2%. Men’s basics are fashion’s quiet natural fibre stronghold — and knowing what to look for keeps it that way.

T-shirts: The Case for 100% Cotton

The best fabric for a men’s t-shirt is the simplest: 100% cotton.

Cotton t-shirts are breathable, soft against skin, absorb sweat, and improve with washing. They’re also cheap to produce, which is why the category stays so natural — there’s no cost incentive to swap in polyester.

Cotton grades that matter

  • Ring-spun cotton — fibres are twisted tighter, producing a softer, smoother fabric. Look for this on premium basics.
  • Combed cotton — short fibres are removed, leaving longer, stronger ones. Less pilling, better hand feel.
  • Pima / Supima cotton — extra-long staple cotton grown in the US and Peru. The premium tier. Noticeably softer and more durable than standard cotton.
  • Organic cotton — grown without synthetic pesticides. Identical feel to conventional cotton, but fewer chemical residues.

What to avoid

Polyester blends. Some brands add 30-50% polyester to t-shirts to reduce costs or add “moisture-wicking” properties. The result is a shirt that traps heat, holds odour, and feels plasticky. Unless you’re buying activewear specifically, there’s no reason for polyester in a t-shirt.

Fibr’s data shows 87.1% of Bershka t-shirts and 89.8% of Zara t-shirts are majority natural. The category is solid — but the 10-13% that aren’t can catch you off guard if you don’t check.

Shirts: Oxford, Poplin, and Linen

Men’s shirts are another strong natural fibre category — Zara shirts average 82.2% natural fibre. The traditional shirt fabrics are all cotton or linen, and that heritage keeps the category relatively clean.

Oxford cloth

The workhorse of men’s shirting. Oxford cloth is a basket-weave cotton that’s textured, durable, and slightly casual. The Oxford cloth button-down (OCBD) is arguably the most versatile shirt a man can own. Look for 100% cotton.

Poplin

A tighter, smoother weave than oxford. Poplin shirts are dressier and lighter. Traditional poplin is 100% cotton, but cheaper versions may blend in polyester for wrinkle resistance — check the label.

Linen

The best warm-weather shirt fabric. Linen is more breathable than cotton, absorbs more moisture, and actually gets softer with every wash. The trade-off is wrinkles — linen wrinkles heavily and looks deliberately relaxed. If you can accept the creased look, linen shirts are superior to cotton in summer.

What to avoid

“Easy care” or “non-iron” shirts. These are treated with formaldehyde-based resins to resist wrinkles. The chemical treatment can irritate skin, and the fabric loses breathability. A cotton shirt that needs ironing is a cotton shirt that works properly.

Chinos: Cotton Twill Is the Standard

The chino is a cotton garment by definition. The word refers to a specific cotton twill weave — originally developed for military uniforms because cotton was tough, breathable, and comfortable in the field.

What to look for

  • 100% cotton twill — the purist choice. Sturdy, breathable, ages well. Will wrinkle.
  • 97-98% cotton, 2-3% elastane — the practical sweet spot. The small amount of elastane adds stretch for comfort without changing the fabric’s character.
  • Heavier weight for durability. Lightweight chinos wear out faster. Look for 8-10 oz weight for pants that last.

What to avoid

Any chino with more than 5% synthetic content (excluding elastane for stretch). Some budget brands make “chinos” from polyester-cotton blends that lose the breathability and hand feel of real cotton twill. If the label says 60% cotton 40% polyester, it’s not a chino — it’s a polyester pant in disguise.

Why Men’s Basics Stay Natural

There’s a reason men’s basics haven’t been overrun by polyester the way women’s dresses and activewear have:

  • Cotton is cheap. For simple t-shirts and shirts, cotton is cost-competitive with polyester. There’s no economic incentive to switch.
  • Men’s basics are conservative. The market resists fabric changes. A cotton oxford shirt has been a cotton oxford shirt for decades.
  • Polyester doesn’t improve these garments. In dresses, polyester adds drape. In activewear, it adds stretch and wicking. In a t-shirt, it just makes it worse.

Fibr’s data across 17,365+ products and 6 retailers confirms: t-shirts, shirts, and jeans consistently rank as the most natural categories, regardless of brand.

The Fabric Cheat Sheet

Garment Best Fabric Acceptable Avoid
T-shirt 100% cotton (ring-spun, Pima) 95%+ cotton with elastane Polyester blends
Casual shirt 100% cotton oxford or linen Cotton-linen blend “Easy care” treated shirts
Dress shirt 100% cotton poplin or twill Cotton with 2% elastane Polyester blends, non-iron
Chinos 100% cotton twill 97% cotton, 3% elastane Polyester-cotton blends (>5%)