A simplex fabric is one which is produced on a warp knit machine known as a simplex machine. These are wide and flat, similar to a tricot machine, but the machine has two needle bars which essentially produce a double and integrated thickness of fabric. Simplex fabrics have good stretch and recovery in the width without using any spandex fiber content. Simplex was the original glove fabric and it was also originally used in swimwear. The drape and hand of the fabric is incomparably soft and flowing which makes it suitable for drapes, displays and architectural fabrications. Simplex fabrics of 100% polyester can be finished to easily achieve NFPA 701 flame retardancy for home or hotel furnishings. Simplex is also the most sought after fabric for brassieres, especially in large sizes where spandex doesn't offer enough control.