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Examination of a sample of nylon shirting material revealed IR characteristics which have been achievable only by subterfuge methods. The results show that this lowering of the IR characteristics may have been fortuitous deriving from the presence within the fiber of a percentage of Cuprous Sulfide. There is some evidence of probable loose bonding between the copper compound and the nylon based on the fact that the color produced is olive rather than gray, the normal color of Cuprous Sulfide. The durability to laundering is moderate. Fastness to light is that characteristic of the dyes used and does not seem to be influenced by the presence of the Cuprous Sulfide. (Author)