Hello, nice to meet you! (^o^) 10 brand new, unopened sets Developed by a dental technician, this is a teeth guard. It's a mouthguard for baseball. You can talk and drink water while wearing it. It's a special mouthguard that can be molded to your own teeth. Simply place it on your lower molars to prevent tooth wear and damage. By supporting the clenching effect of the molars, Muscle strength and instantaneous power increase. Prevents tooth wear and damage ✨ It's easy to use. Soften it with hot water and mold it to your teeth to create your own custom teeth guard. Made in Japan, with peace of mind ➰♥️ I will ship it via anonymous shipping ➰ Thank you very much m(_ _)m #mouthguard #sports #teethguard