Half face gas mask Outstanding Features 1.Low profile design allows a wide field of vision 2.Light weight makes long period of wear bearable 3.Soft, elastomeric face-fit secures a lasting comfort 4.Unique easy to don/doff strap system 5.comfortable and adjustable Technical Data 1.Inner layer is made of silicone ,which reduces the fiber drops and increases the wearing 2.the filter layer is made