Lifesaving inflatable waistcoat, type LS-N

The life-saving vest LS-N is a personal water rescue device for people weighing 43kg and standing 155cm or more tall with a chest volume of up to 1750mm.
The waistcoat complies with the requirements:
RS 2019 Regulations for the Equipment of Sea Vessels; Technical Regulations on the Safety of Maritime Transport Facilities; International Code for Lifesaving Equipment Resolution MSC.48(66) as amended by IMO Resolution MSC.207(81) and MSC.368(93).
The waistcoat has been tested in accordance with the requirements of Resolution MSC.81(70) Revised Recommendation for the Testing of Lifesaving Equipment" as amended.
The buoyancy of a fully inflated waistcoat is not less than 180N.
Waistcoat dimensions:
when inflated - 750x400x180 mm;
in the folded state - 600x350x80 mm.
Weight of the waistcoat is not more than 1.5 kg.
Operation of the waistcoat in the range of ambient air temperature from -15°C to +40°C and water temperature from -1°C to +30°C.
Storage of the waistcoat at air temperature from minus 30°? to 65°?.
The waistcoat implements the principle of two chambers. Each chamber...