Euphonium mouthpieces are completely custom-designed, fine-tuning every detail to the player's needs: rim width, cup depth, grain diameter, and more. Their exterior design is optimized to ensure perfect intonation and a balanced sound, while their interior is individually designed using our CFD finite element simulation method, ensuring efficient and comfortable airflow. This translates into a noticeable reduction in fatigue, allowing for longer, more comfortable playing. Made with 100% biodegradable materials certified for skin safety, they offer a completely smooth and pleasant surface in contact with the lips, preventing irritation and reducing the risk of dermatitis, fever, or other skin conditions. They are also ideal for playing in cold temperatures, providing a much more comfortable thermal sensation than traditional mouthpieces. An innovative option for those seeking a distinctive, custom-made mouthpiece to enhance their sound and comfort.