Material: Polyethylene. Easy to use, just wear it on your teeth. One size is for everyone. A special custom mold can mask the skewed, stained, missing and notched teeth. It is an excellent substitute for expensive braces. Beautiful dentures make you smile more. For whitening teeth, it can be glued directly to the teeth. Easy to use. It can be dissolved automatically when it meets hot water. The perfect adult makeover can be done in just a few minutes and then transform your teeth into a perfect smile.