Designed to protect you from being injured.
Convenient to use
High quality material for you
Suitable for Boxing, Hockey Martial arts or some kind of rough sports
Transparent and comfortable, one size suitable for all
Reusable

Instructions:
Place the gum shield in hot water(about 80℃/176℉)
After 20 seconds, get it out and bit down, make sure it can against upper jaw.
Put it into cold water and make it shaped.
It can be reheated and give a re-custom fit