Worsted is a good choice because it offers the advances of wool without a wintery, heavy look. Natural fiber twills like cotton gabardine have obvious diagonal ridges, and are known for durability. Another durable fabric is Dacron. Trousers can be pleated or straight. The British cut is more tailored with squarer shoulders, slightly nipped waist and side vents.
Trousers are sometimes cuffed.
The Athletic cut is designed to fit men with broader shoulders and smaller waists. Evaluating the quality of a suit's construction is very important. We can't say enough about this category. Round shoulders may make the collar pull away from the neck. Raising the collar solves that.