It is made of plastic. It is safe and non-toxic. Ergonomic , comfortable to wear. The cleaning head is made of soft and soft silicone, which will not damage the soft tissues of the cavity and is not deformed after long-term use. With storage box, hygienic and portable. Multi-scenario applications, bedrooms, offices, dormitories, airplanes, , etc., invisible light, quiet mouth, beating, teeth grinding; do not worry about "nor" will affect others. and after use, it can be disinfected with alcohol or boiling water. Name: Snoring device Type: Anti Snore Mouthpiece Work Mode: CPAP Pressure Range: 4-20 cmH2O Model Number: Anti Snore Mouthpiece Item Type: Sleep & Snoring Colour:white Material:plastic Package Contents: 1 * Snoring device Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.