Long-time teeth grinding will cause many health problems, thus, we need something to help for teeth grinding.thermoplastic technology, the teeth grind dental protectors are totally customisable to fit your mouth and teethThese nighttime trays will offer you great comfort upon wearing. The ultra-comfort guard relaxes jaw muscles, prevents teeth grinding, clenching and alleviates problems that may cause dental injuries.Dental mouth guards are very effective, and often the best solution to your Bruxism, The mouth guard is often the first suggested treatment from your dentist.In normal use, the use-time of one mouth guard is about 6 month. For healthy use, we recommend that one mouth guard use for one personUsageStep 1: Heating the Mouth GuardImmersing the dental impression tray in hot water(70 degree C-80 degree C) completely until soft(about 15s).Taking it out of hot water immediately and insert into your mouth,Using your and tongue to adjust until perfectly fit around your teeth.Remove Mouth Guard and under tap water for 5 seconds to solidify, and replace into mouth and test for a good, firm fit.colour:blueMaterial:EVAsize:9*3.5*15.5CMPackage Contents:2 * occlusions4 * trays1 * InstructionsNOTE:Don't put it in hot water for long time.Please keep your dental guards dry and clean. Put it in the storage box after each use.The dentist recommends changing your mouth guard every 6 months.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.