Transparent Eva Karate Children Boxing Rugby Sports Mouth Guard Adults Mouthguard Teeth Protector With Plastic Case Box Type:Sports Mouth Guard Size: Free Size (Approx. 7*6.3*3.5cm) Material: Silica Gel Color: White/Blue/Red Package Included:1 X mouth guard with box This is a 100% brand new mouth guard with excellent quality Dual density structure, softer than other teeth protectors Heating snap-in design, more fit users' tooth form. Groove fit the surface of the teeth, convenient to keep breathing smoothly and does not affect the protective effect of teeth during strenuous exercise. The mouth guard can reach to rear molars, to provide complete protection. ideal for judo, grapple, free combat, ice hockey, rugby football, BJJ, baseball and Thai etc. How to use: 1. Put it to cup of warm water (70 to 80 Celsius degree) till soft for about 10 seconds 2. If it is soft, insert it to your upper teeth in mouth 3. To memorize your mold of teeth, bite it 10~15 seconds 4. If it is fit to your teeth, clean it with water and use it 5. If it is not fit to your mouth, you can fix it again from step 1 Note: Setting the water temperature of 70-80 degrees is appropriate, soaking time should not exceed 10 seconds(It is strictly prohibited to use water at 100) Notes: 1. Due to the difference between different monitors, the pictures may not reflect the actual color of the item. 2. Compare the detail sizes with yours, please allow slight difference due to manual measurement.