The ColdAvenger FRC Expedition Balaclava has been called the warmest and most versatile cold weather mask available and is built specifically to worn while on the job site during harsh winter conditions. Is made with Polartec Thermal FR fabric which combines the performance benefits of heavy fleece with the protection of permanent flame resistance with our revolutionary two piece balaclava design to protect your head, neck and face in the coldest weather. The unique two piece design allows for easy removal of the ventilator without having to remove the full balaclava or other head wear. The patented, medical grade ColdAvenger ventilator keeps your face dry and your airways relaxed with warm and humidified air, while allowing you to breathe freely without resistance, even during high endurance activities. The comfortably designed balaclava with generous hook and loop closures allows for a custom fit every time.