DenTekProfessional-Fit, Maximum Protection Dental Guard For Teeth Grinding, 1 Count

What is this actually used for? it clearly states not for tmj or grinding teeth at night in the warning section of the pamphlet

After you peel it out of the tray, does it consist of one piece of flexible plastic? Or is the flexible part laminated to a rigid part?

Where is this made?

Can someone tell me the contact number for helping these fit? I must have messed up. Mine fell out on floor while sleeping.