Safe and environmentally friendly material: Firrenty Mouth Guard Protectors is made of high-quality food-grade ethylene vinyl acetate (EVA) material, safe to use and environmentally friendly, free of BPA and phthalates, mouth guard for clenching teeth at nightto achieve comprehensive oral care easy to clean and reuse, long-lasting wear. Easy to use shaping: Our Mouth Guard is very easy to use, And the night guard will help you prevent jaw pain, toothache and headache caused by teeth grinding. You will have a comfortable sleep. Multi-Purpose Mouth Guard: The mouth guard for clenching teeth at night stops teeth grinding, the multi-purpose Mouth Guard for Grinding Teeth can also be used as a teeth whitening tray and as a sports guard to prevent sports-related tooth impact. 100% SATISFACTION SERVICE: With a customer-centric approach, if you have difficulty molding your night guards for teeth grinding or are not satisfied, please feel free to contact us for further assistance or a full refund.