Teeth grinding prevention with a 1-week type mouthguard. Reduces snoring. Brand new, but please refrain from purchasing if you are sensitive to items stored at home. *The item will be shipped via Yu-packet after being removed from its box, so the box is not included. Please comment if you would like the box. *Instant purchase is welcome. *Price negotiations are possible. *Discounts are available for combined purchases with other items, so please comment. Thank you for viewing.