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COMFORT SIZES 1 & 2
The ZQuiet Comfort Refills are the same mouthpieces supplied in your original 2-Size Comfort System Starter Pack and is recommended for most people. Replace it at least every 4 to 6 months for the best results.
FIRM SIZES 1 & 2
Designed for people that clench and grind their teeth and/or prematurely wear out the standard Comfort Mouthpiece. Made with a stiffer grade material and extra strong hinge, the ZQuiet Firm Refill should only be used by people with very healthy teeth and strong jaws.