General Health Care Mouth trays are designed with durable thermo plastic that customises to fit your unique mouth shape. Works in minutes - you can shape the trays easily to fit your teeth. This helps keep the trays in place more securely, giving a more even treatment when performing teeth whitening or other oral gel treatments. These trays are designed to fit individually for the upper and lower teeth, allowing for them to be treated individually. The convenient flap makes it easier to get the tray into or out of the boiling water needed to shape it . Quality pyroplasticity material trays, soft, elastic, make the patients comfortable. Color: clear Material: EVA medical standard