This is a randomized, supportive care trial in which men with prostate cancer on ADT and experiencing bothersome hot flashes will be assigned to either immediate use of the Embr Wave device for 12 weeks or delayed use (usual care for 6 weeks, then device for 6 weeks). The Embr Wave is a commercially available wearable device that provides a cooling sensation and is being tested for its ability to reduce hot flash severity and improve quality of life. Participants will be enrolled across the DF/HCC consortium and collaborative sites.