Sisu Aero Gum Shield Size:Medium ThermoReg technology keeps you warm

ThermoReg technology keeps you warm in cold conditions

Silicon Injection moulding Punch Zone and non-slip grip backhand

Durable and ergonomic design tailored for an active sport

The fabrication works to wick excess moisture and sweat away from the skin where it can be easily evaporated

Sisu Aero Gum Shield Size:Medium ThermoReg technology keeps you warmAs invisible and ultralight as the air for which it was named, SISU Aero is the 1. 5 mm high tech mouthguard that started it all. Designed for athletes who prefer to easily talk, breathe and drink during game time (otherwise known as: all athletes), the Aero is revolutionizing mouthguards one mouth at a time. Size guide Small Up to 5' (150cm) Medium 5' 6' (150cm 180cm) Large Over 6' (180cm +)