The effect of moisture on thermal protection in fire fighters glove materials was determined during radiant and conductive heat/pressure exposures. Typical glove materials were studied with and without a Gore-Tex moisture barrier. During exposures to a radiant load of 2.3cal/cm2 sec, wetted samples provided more thermal protection than dry samples. Different results were obtained using conductive heat/pressure tests (500 C at 0.28 kg/cm2 pressure): dry Gore-Tex mitts provided more thermal protection than totally wetted samples, while the reverse was true of glove materials without Gore-Tex.