SISU 3D Custom Fit MouthguardEasy, effortless fitting! SISU Mouthguards are known for their unmatched protection, comfort, cleanliness, and remoldability. Though it might not seem possible, we made an even better mouthguard! SISU 3D improves on previous SISU models, and adds a number of new features: Pre formed guard for an effortless, fast, fit and go shape Variable material thickness to put protection where it is needed, and comfort where it is desired Details: 2. 0mm thin Pre