both Upper & Lower teeth -– Can be trimmed for comfort. , Stabilizes, Cushions the lower jaw with Dual Design. Creates and - maintains at Space. Tested and Proven to reduce energy to the base. A good model to Cover Upper & Lower Braces. Good for increased Free-Breathing! and Breath! Multi-sport model– Includes. Improves Performance and Strength - Promotes. Includes hard storage Case with name label. Please Note: Case may vary depending on availability.