BRACES FIT: Custom fit over braces - and it can be adjusted and refit as teeth move. EASY TO FIT: Microwavable product requires no boiling water. PERFECT CUSTOM FIT: Our proprietary fitting materials provides a comfortable lockdown fit ensuring the night guard stays in your mouth versus ending up on your pillow. SAFE & COMFORTABLE We ensure our thin mouth guard for teeth grinding is made of safe materials, well-constructed, and comfortable to use every single day. HIGH-QUALITY: BPA free with proprietary hydrophobic fitting material.