Women's Wool Coat

A wool coat gets its warmth from the density of the cloth itself, not from anything stuffed inside it. Wool fibers are crimped, so a woven wool traps still air between them, and still air is what insulates. Tailoring does the rest: a collar and lapels, a set-in sleeve, a full lining and often a belt.

Cloth weight tells you the season better than the style name does. Around 350 to 450 grams per square meter you have a coat for fall and mild winter. Above 500 you have one for real cold. Melton, a wool milled and felted until the surface is smooth and the fibers are packed tight, blocks wind almost like a shell. Fiber percentage matters as much: a coat that is mostly polyester weighs less, insulates less and pills along the sleeves within a season. Cashmere adds softness and loses durability, so a wool blend with 10 to 20 percent cashmere outlasts pure cashmere at the same price.

A puffer beats it on warmth for the weight and loses on formality, because quilted channels always read casual. Trenches handle rain and stop being useful below about 45 degrees. Moto jackets and bombers end at the waist, leaving the part of you that gets coldest uncovered. Among long options, wool is the one that goes over tailoring without looking like sportswear.

Cold and dry between roughly 20 and 50 degrees is where it beats everything else, on city commutes and over a blazer or a suit. Buy the size that closes over your thickest knit, since a coat that pulls at the chest is a coat you stop wearing. Wet snow is a problem unless the cloth carries a water-repellent finish, and wool does not compress. It will never fold into a bag.

Rub the cloth between your fingers for ten seconds. Fibers that come away in a small ball tell you exactly how the sleeves will look by March. A full-length lining and shoulders that clear a suit jacket are the two things to confirm, since the shoulder is the one measurement no tailor can improve. Brush the coat after wearing with a stiff clothes brush, always in one direction, which lifts out the grit that cuts wool fibers. Dry clean once or twice a season at most, because the solvent strips the natural oils that keep the cloth supple.