In DuPonts Folder Titled "Kevlar in Mechanical rubber Goods, Technical Database" it list the thermal conductivity of Kevlar as 0.04 Joule/(sec.cm^2.K.cm)this compares with 0.23 and 0.15 quoted for Nylon and Polyester, respectively. It also gives the general comment that "the thermal conductivity of Kevlar is much lower than that of other organic fibres.