<b>Note:</b><br> 1.Rinse with cold water before use.Don't use the hot water or the mouth guard will be deformed because of the high heat.<br> <b>How to use?</b><br> 1.You can drink some water avoid the mouth dry before wear. Please close the mouth to avoid the teeth guard running out when you use.<br> 2.You need 3 to 7 days to adapt to the mouth guard. Slobber,tooth pain, sick are the normal phenomenon.< br>