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The ZQuiet Firm is a boil-and-bite anti-snoring mouthpiece made from a stiffer-grade material with an extra-strong hinge. It holds the lower jaw slightly forward to open the airway, and the firmer build is aimed at people who clench or grind their teeth or wear through the standard ZQuiet faster than every few months. It comes in two jaw adjustment sizes, so the fit depends on picking the right one. Against softer mouthpieces it trades some comfort for durability; against custom dental appliances it is far less expensive and needs no dentist visit, but it is bulkier and less precisely fitted.
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Rated 4.7 out of 5 from 264 ratings, the Firm version draws praise for holding up where softer mouthpieces wore out. Users report less snoring and better sleep, with some early discomfort that usually settles.
The ZQuiet Firm Mouthpiece is an anti-snoring mouthpiece made from a stiffer-grade material and built with an extra-strong hinge.
It is made for people who clench or grind their teeth, or who need to replace the standard ZQuiet mouthpiece more often than every 3 or 4 months.











