A Practical Guide to Suit Fabrics and Cloth Weights

Fabric choice affects a suit's comfort, appearance, and longevity more than almost any other decision. Here's how to navigate it without getting lost in jargon.

Weight matters more than most people think

Cloth weight, measured in grams per metre, is the single most practical factor. Lighter cloths (roughly 220–260g) suit warm climates and year-round wear in temperate cities; heavier cloths (280g and up) hold a crisper shape and suit cooler climates or more formal, structured tailoring.

Super numbers, explained honestly

A 'Super' number (Super 100s, 150s, 180s) measures the fineness of the wool fibre, not overall quality. Very high Super numbers can actually be more delicate and prone to shine and creasing with frequent wear — for a suit in regular rotation, a Super 100–130 in a slightly heavier weight is often more practical than an ultra-fine option.

Common fabric types

Worsted wool is smooth, durable, and the most common suiting cloth. Flannel and tweed offer texture and warmth for colder climates. Fresco and hopsack are open-weave wools built specifically for breathability in hot or humid environments. Cotton and linen suit casual warm-weather tailoring but wrinkle more readily.

A starting recommendation

For a first commission, a solid navy or mid-grey in a medium weight worsted wool is the most versatile choice — it works across the widest range of settings and climates while you learn what you actually prefer.