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. The Brush Pro mask and Whiffs Shroud are lined with blue Indura Ultra Soft cloth with a hydro lone finish. This material helps to wick moisture from the firefighters face and prevents the transfer of radiant heat to the skin. The Brush Pro mask and Whiffs Shroud are usually used by advance strike teams that need maximum protection from heat and particulate matter. The shroud is detachable when not needed. The Brush Pro mask and Whiffs shroud weigh 4.8 oz. together. They are machine washable in cold water, and should be hung to dry. (Xcaper filters are sold separately.)