This G1 SCBA Facepiece with a 4-pt Kevlar head harness is also equipped with a speaking diaphragm to increase speech clarity while off air. The new G1 Facepiece is not only lightweight and compact with overall low profile design, it's comfortable and built to last. Taking the preferred design features of the Ultra Elite Facepiece, including wide field of view and comfortable, robust seal geometry, we've taken the MSA G1 SCBA to the next level with an open port to provide low breathing resistance, both on and off air.