The Whiffs Shroud fits the Brush Pro Mask and is made of Advance Nomex which carries a 1050° rating. The Shroud is 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. It is the perfect accessory when more protection is needed. The three Velcro attachment points on the INSIDE of the mask should be used to attach to the Whiffs Brush Pro mask. The Whiffs Shroud weighs 2.6 oz. It is machine washable in cold water, and should be hung to dry.