Neck Closure Large Size (56-64 cm) HLA 66 3-in-1 nozzle: Flip between fan-jet

3-in-1 nozzle: Flip between fan-jet

front and rear sections allow excess body heat to escape

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Neck Closure Large Size (56-64 cm) HLA 66 3-in-1 nozzle: Flip between fan-jetProtos Neck Closure Large Size (5664 cm) The Protos Neck Closure Large Size is designed to increase the head circumference range of your Protos Integral helmet, providing a more comfortable and secure fit for users with larger head sizes. By swapping the standard neck closure for this larger version, you can extend the adjustable range of your helmet for improved comfort, stability and safety during professional use. This replacement neck closure is