A novel technology that has been spreading in recent years is the wearable one. It has wide variety of applications, from the medical field to the military one. From the point of view of the human exposure, the wearable devices are interesting because the antenna is posed on the human body, directly involving the human tissues in the exposure. Moreover, since the antenna is integrated in the human clothes, it is very likely that it could modify its position. For this reason, in this work the exposure assessment has been performed by means of stochastic dosimetry, in order to evaluate the effect of the variation of the antenna positions on the exposure level. In this work, it was obtained a surrogate model that makes possible the exposure assessment in 1000 different positions of the antenna, with a computational cost significantly lower than the deterministic dosimetry and describing the exposure with an error below the 3%.