Carbon Gel Vento Colored Front, Tendon Boot Black/Light Blue LCarbon Gel Vento is the cannon bone protector that guarantees double ventilation. The heat released from the horses leg passes through the microperforated neoprene layer and is then distributed in the 3D mesh ducted fabric. Fresh air enters through the air inlet as a result of the animals movement and directs the heat accumulated in the ducted fabric upwards to the outlet grille. Ventilation is therefore horizontal and vertical.