Cotton

Cotton Suit Fabric: where cotton belongs

Cotton is the shirting fibre. For shirts it is the default and it is very difficult to improve on: breathable, comfortable against the skin, easily washed, and available in an enormous range of weaves and weights.

In suiting it is a specialist. A cotton suit is cooler than a heavy wool one and takes a very crisp press, which suits a certain sharp, slightly informal look. It also creases readily and, crucially, does not recover overnight the way wool does. That makes it a good second or third suit rather than a first.

For chinos it is the obvious choice.

The weaves

Poplin is a simple plain weave with a fine crosswise rib. Smooth, crisp, clean under a jacket, and the classic dress shirt cloth. Slightly cooler than twill because the weave is more open.

Twill has a diagonal rib created by the weave structure. It drapes more softly than poplin, resists creasing noticeably better, and has a subtle sheen. A good choice if you want a shirt that looks tidy at the end of a long day.

Oxford is a basket weave, heavier and visibly textured. It softens beautifully with washing and reads as casual. Excellent for casual shirts, wrong for a formal one.

Royal oxford is a finer, dressier version with a subtle lustre that bridges the two.

Sateen has a satin weave with a smooth, slightly lustrous face. Used for dressier shirts and for structured work dresses.

Two-ply beats thread count

The most useful thing to know when buying cotton, and the least advertised.

Two-ply means the yarn is spun from two finer strands twisted together. It is stronger, smoother and far more resistant to the thinning and pilling that appears at collar folds and cuff edges after dozens of washes.

Thread count is heavily marketed and much less meaningful. Very high counts require extremely fine yarns, which produce a soft, luxurious cloth that wears out faster. A two-ply 120s will comfortably outlast a single-ply 200s.

If a shop can tell you the ply, that is a better signal than a large number.

Weight and climate

Shirting runs roughly 100 to 160 grams. In Chiang Mai’s heat, lighter poplins and voiles are noticeably more comfortable, at the cost of some transparency.

Cotton suiting runs heavier, typically 250 to 350 grams, and a lighter cotton suit in an open weave is a genuinely pleasant warm-weather garment.

Care

Wash cool, and avoid hot tumble drying, which is what actually wears cotton out and causes most shrinkage. Press while slightly damp for the crispest finish.

Cotton, unlike wool, genuinely benefits from regular washing rather than airing.