The Ez Sleep mouth guards are made of high-quality silicone materials. The guards are FDA approved and BPA-free which means our mouth guards are safe and hygienic. These mouth guards are moldable, and easily adjusted to provide maximum comfort. Teeth grinding not only can affect your mouth, but it can affect other body parts as well. Anxiety or stress can affect teeth grinding and clenching, which can give headaches, facial muscle pain and spasms, jaw and neck pain, and insomnia. Ez Sleep teeth protector is easy to use and fits perfectly.