Dress trousers are the most formal part of the trouser range. Wool and wool-blend styles work well with dress shirts, knitwear and jackets, while cotton trousers are a lighter option for less formal business and smart-casual outfits.
Plain fronts give the simplest shape, while pleats add room through the upper leg and a more traditional detail. Fabric weight matters too: worsted wool has a smoother finish, while flannel has more texture and warmth for cooler weather.