Save time with these convenient and comfortable-fit foam trays, created with a typodont design to reduce overflow and provide even coverage of fluoride to all surfaces. Available in hinged and single alternatives. Hinged: Easy, removable tabs for fast and simple clean up. Color-coded sizes: Small (Yellow), Medium (White), Large (Blue). Single: Provides a more comfortable experience, one arch at a time. Ideal for children and patients with a hyperactive gag reflex.