Comfortable half mask offers low pressure, continuous flow protection with the same unique “over the shoulder” hose design and belt as the full facepiece respirator. It’s durable and easy to use with OBAC quick connects. The low profile design allows it to fit under welding shields. The skirt is made from silicone, is easy to clean and it won’t lose its shape in storage. NIOSH approval TC-19C-355. In addition, a choice of a ¼ hp ambient air pump (one-worker), ¾ hp pump (two-worker) and 50 or 100 foot breathing air hose. Sold by the each system.