The Whiffs Brush Pro mask and Whiffs Shroud are made of Advance Nomex, which carries a 1050° heat rating. The breathing port of the mask is made of Nomex knitted hood material which also carries a 1050° heat rating. Included with this product is a detachable elastic head strap. This strapping system secures the mask and filter to the firefighters head, assuring that the mask will not slip down in any type of condition.