Natural fibers make for the finest suit fabrics. While a small proportion of polyester or nylon can add strength to a suit, too much synthetic fiber can detract from its important qualities. Wool, whether in a summer or winter weight, “breathes”, allowing air to pass easily through the fibers. This reduces the need for frequent dry cleanings.
Look for fabric that isn’t shiny, and that lays down comfortably when worn. Fabric should feel smooth and supple to the touch. Winter fabrics may be more substantial, but should still feel natural to the hand. Summer fabrics may include wool and silk blends, giving them a lighter feel while retaining the soft, relaxing feel of natural fibers.