Welcome to the Half Face Respirators category at Allens Industrial Products. Here, you'll find a comprehensive range of half face respiratory protection solutions designed to safeguard against contaminants.SUNDSTRÖM SR100 Half Face Silica Dust Respirator Kit. The Sundström SR100 Silica Dust silicone half face respirator is designed for heavy-duty work during extended periods. Silicone mask (low allergenic, superior facial seal). SUNDSTRÖM SR100 SILICA RESPIRATOR FEATURES Deep chin cup and broad nose rim. Two exhalation valves. New valve caps with air diffusion (no clogging...