Translated from the Kampo website:

Included in the equipment HLM-5. Intended to create the necessary conditions of life and to ensure the diver under water. Helmet isolates the head from the environment, protect it from possible mechanical shock and provides heat protection. Building helmet made of fiberglass and is a force and the connecting element.
The main differences helmet HLS-5 from the helmet «SupreLite» Company Kirby Morgan:
applied more productive-lung machine (low resistance, and the work of breathing);
Inside the helmet-blowing is carried out constantly in the process of respiration, or forcibly opening the valve forced airflow;
flexible hose-lung machine ensures ease of installation and better protection for mechanical influences;
-lung machine is provided at the atmospheric valve that reduces air flow when putting on and removing equipment. In an emergency surfacing fast switch to breathing atmospheric air (big advantage);
-lung machine is simple and easy to maintain (easily disassembled and assembled for the control of the membrane). For the special conditions of the shutter is provided with a rubber clamp to secure the lid lung machine;
functionally-comfortable and easy to use drying system of the helmet in the event of water ingress;
Headset provides equipment to work with different types of stations diving links and offers superior call quality and intelligibility of speech;
-easy donning and removal through the use in the construction of quick connections without the use of special tools.
and staff retention are installed for the light and camera;
-increased field of view of the porth*** of 10-15% due to its size and greater proximity to the diver's face.
Neck ring of the helmet is unified with the helmet «SupreLite 27" and can be used with the staffing overalls GC IEDs, and coveralls with other manufacturers, such as Viking.

http://www.kampo.ru/