SoFresh toothbrushes have a patented double-tiered bristle design. What makes it more effective? The SoFresh shorter, thicker bristles do the easy cleaning that your typical toothbrush accomplishes. The SoFresh longer, thinner bristles easily reach deeper between teeth and below the gum line. No other toothbrush does a better job at removing plaque from those areas most people neglect. What colors can I order? SoFresh Adult toothbrushes come in 6 colors: Blue, Gray, Purple, Orange, Seafoam, and Yellow Are SoFresh soft toothbrushes? Yes. All SoFresh toothbrushes are rated soft. Keep in mind there isn't another Soft toothbrush that has this patented design. The longer bristles keep this toothbrush from flattening during use. When your typical soft toothbrush flattens out during brushing it actually makes your toothpaste more abrasive. When bristles flatten they create a flat surface with abrasive toothpaste that studies have shown can damage your teeth and gums. This is especially important if you use 'whitening' toothpaste, which is usually very abrasive. How often should I replace my toothbrush? Dental professionals recommend a new toothbrush every 3 months. Your SoFresh will easily last 3-4 months. What are the bristles made of? SoFresh Flossing Toothbrush bristles are made of an exclusive material. These special micro-textured bristles were chosen because it is softer and more elastic and durable than your average nylon or plastic bristles.