The American Firewear Heat-Guard hood is a patented targeted Heat-Guard insulation front where the helmet ear covers do not contribute to insulation and MOST head burns occur. The patented exterior Eagle HTC™ Carbon Blend Black/interior Nomex® fleece Heat-Guard elevates the hood’s total performance outside the ear covers dramatically with minimal extra cost and weight (the 2 layers of Nomex® have a TPP of 25.9). Insulation where you need it, and only where you need the extra protection.