Extremely durable plastic
The fully tested and certified KMB® 28 Band Mask® may be used in mixed gas diving as well as shallow water air diving.
The SuperFlow® adjustable demand regulator provide low inhalation resistance and high gas flow letting the diver breathe easier and work harder. This mask comes standard with the large tube SuperFlow® 350 regulator.
The Side Block Assembly of both the KMB® 18 and 28 receives the umbilical over the shoulder in the B configuration. They both come standard with the Tri-Valve® exhaust system, and the new Band Mask® BandKeepers®
The Tri-Valve® Exhaust System has less breathing resistance than the older single valve exhaust. It retrofits to all previous Kirby Morgan Band Masks®. The Band Mask® BandKeepers®, coupled with the redesigned hood, not only prevent any separation of the hood from the mask, but also make it impossible for the bands to separate from the mask.
The communications connections can be either a male waterproof "plug in" type or bare wire posts.The KMB® 28 Band Mask® is very similar to the KMB® 18. Many parts on the KMB® 18B are interchangeable with the KMB® 28. The major difference between the 18 and 28 is the material of the mask frame. The KMB® 18 has a hand laid fiberglass frame (yellow) while the KMB® 2B frame is an extremely durable injection molded plastic (black). The relative ease of production of the KMB® 28 frame allows for a lower cost and quicker delivery of this mask. Other differences include: 1) The main exhaust body of the KMB® 28 is part of the frame itself and uses a #545-041 main exhaust cover 2) no comfort insert is required on the "28" 3) the face ports for the 18 and the 28 differ slightly in size.