The AX740 has the Exclusive "AOS" 4

Quick-release helmet tether (strap model)

The Braces Mouthguard

Gel Windows

Airflow breathing channel for 10% more air flow capacity

Gel Nano Double Convertible Colour:Azul The AX740 has the ExclusiveNano protection for upper and lower teeth for high impact sports. This dual arch, low profile mouthguard is designed to enhance upper and lower jaw protection. Featuring a double monocoque shock frame, it absorbs and disperses impact away from the point of contact. CLASSIC FIT: Traditional and original, all around performer High impact technology for high impact sports Protects, stabilizes both upper & lower teeth jaw