Of the many transient phenomena mentioned in the fabric comfort literature, two involve vapor diffusion (without liquid water transfer) from the surface of a perspiring “sweat-covered” body: the “… buffering effect of hygroscopic clothing” at the onset of sweating noted by Spencer- Smith and the “after-exercise chill” discussed by Woodcock. Both Woodcock and Spencer- Smith made laboratory studies with “sweating” hot plates to try to understand the significance of these phenomena. Their fabrics did not touch the wet plate, so there was no liquid water transfer.