Material：Silicone 1.It is designed for healthy adults who wish to reduce the volume and frequency of their snoring. 3.This device is not always effective in treating OSA so it is important to seek guidance from a doctor if you suspect you may have OSA How do you use it: 2.Detailed step-by-step instructions are included and a handling tab is provided. After this one-off fitting you place the device into your mouth before going to sleep and take it out when you wake. 4.If for any reason you need to re-mould it simply follow the moulding instructions again. How does it work 2.This opens the airway in your throat which helps to reduce/eliminate snoring. Package Includes: