The Night Aligner Impression Kit is your first step for straighter teeth, and comes with everything you need to make your teeth molds. It includes a prepaid return shipping label for you to send your impressions back to us. After we receive them, we'll show your straighter smile with a 3D Treatment Preview. Purchase your Night Aligners after seeing your 3D Treatment Preview. The Night Aligners Impression Kit Includes: 4 dental impression trays Dental impression putty Mouth spreader How-to guide  Prepaid return shipping 1-on-1 impression video call 3D Treatment Preview of your new smile