Color: Skeleton Includes mouthpiece case Includes mouthpiece creation instructions Slightly smaller size than adult size, suitable for women and children! It fits perfectly, It's not stuffy, and the thickness doesn't get in the way. It's easy to use and highly recommended! I've tried various mouthpieces, and this one fits the best! To make it, put it in boiling water for about 10 to 15 seconds. Once it softens a little, put it on your upper teeth, adjust it, and lightly bite down to fit. It's easy to make! You can get a perfect fit by repeating this process 3 or 4 times! As a special bonus for a limited time, we're including mouthpiece creation instructions for first-timers, and a color mouthpiece case is also included in the set! Choose from: Blue Green Pink Yellow White Purple Dark Blue Black Skeleton Case If you don't specify a mouthpiece case color at the time of purchase, we will ship a skeleton case. There are two types of skeleton cases, and you will receive one depending on stock availability. Suitable for everyone from beginners to advanced users, and can be used in various sports and daily life! When your bite is aligned, your physical ability and strength will increase, and you can expect improved sports performance! Mouthpiece Mouthguard Teeth Sports Martial Arts Mixed Martial Arts MMA UFC RIZIN Pancrase Deep Shooto Judo Wrestling Boxing Kickboxing Rugby Jujutsu Weight Training Weight Basketball Bellator Rizin Plastic Case Mouthpiece Case Mouthguard Mouthpiece