The Boil and Bite mouthguards offer the user a simple and economical mouthguard and mouthpiece solution. The plastic material of the mouthpiece is heated in boiling water to softened, slightly cooled then placed into the mouth and molded around the teeth. After cooling, the mouthguard or mouthpiece is ready to use. Over time these appliances loose their fit and will likely require replacement. Detailed instructions come with each product and manufacturer.