Lalizas 4D Windtrap Hatch ventilating system.
It provides an eas and efficient way to funnel air into the cabin. It is fastened inside the open hatch and a halyard is used to lift the top. The design helps it to use the outside wind from any direction (4 drive wind trap) and allows the wind to flow through the hatch into the cabin.  Made of 420D polyester reflective silver on the outside and blue interior. Dimensions: 300mm x 300mm x 800 mm.