These mouthguards are made of 100% EVA Silicone POE materials. The guards are BPA free giving all individuals a safe and hygienic way to finally stop grinding their teeth. These mouthguards are moldable and easy to adjust to provide maimum comfort. Color Transparent. Package includes 1 Sleep Aid Mouth Guard with case Made of non toic silicone POE material use safety. Ergonomically designed braces are comfortable and soft safe and wearable. Easy and convenient to use. Direct wear without the need for a complicated process. Applicable adults people who molar in the sleeping time Before each use with 40 degrees under the water rinse clean and then into the mouth gently bite the teeth.