Just like the dentist uses.
Conforms to your teeth for more even and effective application of teeth whitening gel.
They are molded by heating them up in hot or boiling water and then placing them in the mouth to form a precise mold of the teeth. The special blend of polymers has a very low molding temperature so there is no need to use extremely hot boiling water.
*Dental professionals: We also sell soft EVA sheets so that you can make custom trays with your vacuum-forming machine.
Click on image to enlarge.