#$%^&*AU2020202046A120200416.pdf#####Abstract An oral appliance configured to inhibit breathing through the user's mouth, the oral appliance comprising: an upper arch configured to be positioned within a user's mouth proximate the user's maxillary dentition when the upper arch is positioned in the user's mouth, the upper arch comprising a first upper attachment point and a second upper attachment point, the first attachment point and the second attachment point being positioned, with respect to each other, on opposite sides of a plane substantially bisecting the upper arch; and a seal configured to couple to the upper arch at the first and second upper attachment points to inhibit breathing through the user's mouth when the oral appliance is positioned in the user's mouth.