The Opro Gold Mouthguard is one of the best value and fitting mouthguard on the market. It comes with a compression cage to help maximise the fit you get. Opro have their own patented fin technology to accurately mould the gumshield to your teeth. This mouthguard is suitable for all sports including Boxing, MMA, Muay Thai & Rugby. There is so much competition when it comes to self-fitting gumshields. For us Opro are the best and we recommend their full range. The main difference between each level in our opinion is the quality of the fit. This Gold level Opro mouthguard really fits to your teeth nice and secure, meaning you can focus on competition. This adult Opro mouthguard is good for ages 10+.