SGE 400/3 BB
No hydration value or electronic voice amp is available for this mask. The mask has 40mm threads for filters and is outfitted with three ports, one on each side and one in the front.
The face piece is hard plastic and quite large; however, only the center portion is optically correct. The rest of the clear portion is distorted due to its curvature, so only the section that’s about the size of a standard set of dust goggles is usable. This design also makes prolonged wear uncomfortable since it causes some eye fatigue. You tend to look through the distorted sections because they’re clear, but the resulting image is blurry. It was comfortable on the face during the test, and the head harness centers easily. Each strap on the head harness has positive “clicks” when you tighten them. This allows you to better center the head harness with clicks and feel. This mask was unable to pass the OHD machine testing in size medium on this author. It failed three times in a row before we could even start and a fourth time after the first stage. Mestel then sent a small. It passed on the OHD machine, but compressed eyebrows down to the point that it was uncomfortable and impeded vision.