MULTI-PLY KNIT FABRIC
A multi-ply knit fabric (10) containing a first knit ply (100) and a second knit ply (200). The first knit ply (100) contains a plurality of first yarns and forms the upper surface (10a) of the fabric (10). The second knit ply (200) forms the lower surface (10b) of the fabric (10) and contains a plurality of polytetrafluoroethylene (PTFE) yarns having a density of about 2 to 2.25 g/cm3, a transmission in the IR region of 8-10 um at least about 40%, and a thermal conductivity of at least about 0.2 W/(m.K). The plies (100, 200) are integrated through combined portions formed by at least one of the following methods: interlacing first yarns among the PTFE yarns of the second knit ply (200), interlacing PTFE yarns among the first yarns of the first knit ply (100), and interlacing a plurality of third yarns among the first yarns of the first knit ply (100) and the PTFE yarns of the second knit ply (200).