Color: Black & Blue Inside Includes Mouthpiece Case It fits securely and doesn't come off, It's easy to breathe with, and the thickness isn't bothersome; it's the perfect mouthpiece! To make it, put it in boiling water for about 10-15 seconds. Once it stretches a bit and becomes soft, place it on your teeth, adjust it, and lightly bite down to fit. It's easy to make! If it doesn't fit the first time, you can repeat the process 3 or 4 times to get a perfect fit! As a special bonus for a limited time, we're including a mouthpiece instruction manual for first-time users, and Furthermore! We're also including a plastic case, which we normally sell for 600 yen, as part of the set! Choose from: Blue Green Pink Yellow White Purple Dark Blue Black Skeleton Case If you don't specify a color for the mouthpiece case at the time of purchase, we will ship either a skeleton case or a colored case. Suitable for everyone from beginners to advanced users and can be used for various sports! When your bite is aligned, your physical abilities and strength will increase, and you can expect improved sports performance! Mouthpiece Mouthguard Sports Martial Arts Mixed Martial Arts MMA UFC Bellator ONEFC RIZIN Pancrase Deep Shooto Judo Wrestling Boxing Kickboxing Rugby Jiu-Jitsu Weight Training Weight Basketball Plastic Case Mouthpiece Case Mouthguard Mouthpiece