I was doing some research on down and staying warm and I came across a military technical report on the evaluation of the Cocoon 4 system for the Canadian armed forces.
I downloaded a PDF copy of the report described below.
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Accession Number : ADA257809
Title : Testing of the Cocoon-4 Sleeping Shelter
Corporate Author : DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
Personal Author(s) : Ducharme, Michel B.
Handle / proxy Url : http://handle.dtic.mil/100.2/ADA257809 Check NTIS Availability...
Report Date : SEP 1992
Pagination or Media Count : 13
Abstract : The objective of the present study was to evaluate the performance of a new concept of sleeping shelter, the Cocoon-4, in the field and in the laboratory, and under different temperature and humidity conditions that could be encountered by the Canadian Forces. It was found that the concept of adding air to an airtight down sleeping shelter to vary the insulation while keeping the down dry works well. Some problems with the quality of construction and the design of some critical components such as the valves were observed which made the performance of the Cocoon less impressive than expected from the claims made by the manufacturer. It was concluded that the Cocoon-4 could be useful for the Canadian Forces as emergency shelter providing the manufacturer could improve on the quality of his product, and could add some modifications to the design.
Descriptors : *FIELD TESTS, *TENTS, *SURVIVAL EQUIPMENT, TEMPERATURE, EMERGENCIES, MODIFICATION, INSULATION, CANADA, QUALITY, VALVES, HUMIDITY.
Subject Categories : HUMAN FACTORS ENGINEERING & MAN MACHINE SYSTEM
PROTECTIVE EQUIPMENT
Distribution Statement : APPROVED FOR PUBLIC RELEASE ================================================
The link in the above abstract, which appears to be the PDF which I downloaded, does not currently appear to be working. I suggest it be tried after the weekend if anyone is interested in the full report.
I can email it should the original poster be interested.