The MSA 454-10083801 Facepiece Adv 4000 Singe Hycar Cloth LG is a single-piece facepiece respirator that is designed to provide protection from hazardous air pollutants (HAPs). This facepiece respirator is made from a lightweight, durable, and breathable fabric that is resistant to tears and abrasions. The facepiece features a single-piece construction that is easy to adjust and fits most head sizes. The facepiece also has a self-adjusting headband that ensures a comfortable and secure fit. The MSA 454-10083801 Facepiece Adv 4000 Singe Hycar Cloth LG is a great choice for workers who need protection from HAPs.