Worsted Wool Suiting

Worsted wool suiting is woven from worsted yarn, wool that has been combed to lay the fibers parallel and remove the short ones before spinning, which produces a smooth, fine, strong yarn. Woven as a close twill or plain weave at 190 to 280 g/m², it gives a clean, crisp surface with a slight cool hand, the opposite of the lofty woolen yarns in flannel or tweed. This is the standard cloth for tailored suits because the tight worsted structure holds a sharp pressed edge and resists wrinkling through a day of wear.

The cloth takes a crease well and presses to a knife edge, which is exactly what trouser and jacket construction depend on. The trade-off is that worsted can shine if you over-press it: too much heat and pressure flatten and polish the surface into a glossy patch that will not brush out. Always press under a cloth with steam, lift rather than drag the iron, and use a clapper to set a seam with weight instead of extra heat. A 70/10 or 80/12 needle suits the finer weights, and finer thread keeps seams flat.

Worsted frays moderately at cut edges, so bind or overlock allowances, particularly on trousers that take strain. The cloth has no stretch, so pattern fit and ease matter; there is no give to absorb a tight cut. It tailors precisely, holds interfacing and canvas well, and molds over a ham for shaped seams. Reserve it for tailored suits, trousers, and blazers, where the clean finish and sharp press define the garment. Higher yarn counts weave finer and smoother, but also mark more easily under a careless iron.