Premium materials elevate the entire outfit. Trousers made from high-quality wool, cashmere blends, or fine cotton offer both comfort and sophistication. Wool trousers, for example, have a natural drape that feels luxurious while remaining breathable and durable. Fabrics with a slight sheen or texture, like houndstooth, tweed, or subtle pinstripes, can add dimension to the outfit without sacrificing the classic appeal.