Mouthguards in general are made of different types of chemicals that are part of polymers and that commonly; We call plastics. These polymers are moldable when exposed to high (hot) temperatures and this allows the protector to adapt to the athlete's tissues individually. However, the polymers can release chemicals that can affect the health of athletes and that they will carry it in their mouths and therefore in contact with the dental tissues and with the saliva of the patients which they swallow. Some of the chemical compounds harmful to health released by mouthguards are: phthalate, PVC, Bisphenol, and latex. We must bear in mind that 10% of the population in the world is allergic to latex. On the other hand, the chemical compounds phthalate, bisphenol and PVC affect the endocrine system and cause different types of cancers. This is why it is very important that you require that the mouth guard that you are going to acquire has been evaluated with laboratory investigations and with clinical investigations since entities such as INVIMA approve the commercialization of all types of products but especially if those products are in contact with the human beings; and that way they can affect the health of the users or the population that uses this product. Our MID mouth protectors - @sisuguard DOES NOT CONTAIN. phthalate, bisphenol, PVC, or latex.