Thank you for viewing! (^^)(^^)(^^) This one can be used for both upper and lower teeth. 1 piece, upper and lower mouthpieces, soft type, tooth protection, orthodontic treatment, teeth grinding, snoring prevention 399 Item only. Due to being a foreign product, the quality standards are more lenient than in Japan. You can use it without any problems. Body: EVA resin Quantity: 1 piece (can be used for upper and lower teeth.) ・Easy and convenient because it uses a material that softens when put in hot water! You can easily take an impression from the front teeth to the back teeth just by putting it in hot water and biting down! It hardens when cooled, but it's convenient because it softens again when put in hot water! How to use 1. Prepare a container that the mouth guard will fit in. 2. Pour about 90-degree hot water until the mouthpiece is submerged. 3. After about 20-30 seconds, take it out with chopsticks, etc., so you don't get burned. 4. Drain the hot water, let it cool slightly, and then, in front of a mirror, place the central recess of the mouth guard on the center of your teeth and bite down 2-3 times, then bite down for about 10 seconds. 5. Place your finger on the outside of the upper teeth and set it so that it fits the teeth and gums. 6. If it doesn't fit well, repeat steps 1-4. Cut off any areas that feel uncomfortable in your mouth with scissors. (The sharp angles of the cut parts will soften when exposed to a lighter flame) No instructions are included. Please understand that the effect does not appear for everyone. ⚠Because it is made overseas, we consider minor issues such as "small scratches," "small stains," and "slight misalignments" to be within the acceptable range as long as they do not interfere with use, so please understand. ◆Basically, we ship the items paid for by 9 PM the next day, but we may ship them on the same day if we have time. ◆Please check our profile if you want to combine with other products or need multiple pieces. ↓ Many other items are also on sale #♪Bargain shop♪Please see profile.