Smile Brite Economy Fixed Head Natural Soft Toothbrush Soft Natural Bristles. Economy Toothbrush. NATURAL BRISTLES softer than nylon. STANDARD HEAD economy & value. The economy is our standard fixed-head toothbrush which features natural soft bristles, a basic design and a very competitive price level. This toothbrush is designed for anyone who wants a good-quality, good value toothbrush and who has no special dental care needs. Natural bristles have been used for many decades in Europe. Natural bristles appear to have a beige coloration rather than the clear or white of nylon bristles. The fixed head line features an ergonomic ez-grip handle with state of the art design to reach all corners of your mouth easily and effectively.