Most people get it right the first time using our easy to follow step-by-step video and written instructions. Additionally, instead of sending just one set of impression trays, you'll receive three variations (small, medium, and large) as well as an extra set of impression putty in your at-home impression kit. The correct tray size assures greater ease, comfort, and accuracy as you create your impression.  Once you've taken your impression, please send in photos of your impression via email* so we can determine if the impression is suitable for fabricating your final retainers. During this whole process, our detail-oriented and erudite customer support is available for guidance to ensure you create the best impressions! *If you send in your impressions without having them approved and they are deemed unusable, a replacement impression kit will need to be purchased