Reduce HEAT: A Randomized Trial of Wearable Thermal Devices for ADT-Induced Hot Flashes

Inclusion Criteria: * Patients with a clinical or pathologic confirmed diagnosis of prostate cancer * Patients must be undergoing treatment with standard androgen deprivation therapy (i.e., GnRH agonist or antagonist) for ≥ 4 weeks. Patients must remain on ADT for the duration of the study (12 weeks); they may receive treatment with an androgen receptor pathway inhibitor (ARPI), radioligand therapy, or immunotherapy combined with ADT. * Patients must report bothersome hot flash symptoms (defined as ≥ 28 hot flashes per week, perceived to be at least moderately bothersome to the patient), during a period of at least 30 days prior to entering the study. * Age ≥18 years. * ECOG performance status ≤ 2 * Ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria: * Pregnant and nursing women are excluded as prostate cancer is a disease of men. * Participants with a concurrent diagnosis, including separate malignancy, that may limit life expectancy \< 6 months. * Systemic antineoplastic therapy besides approved ARPI, radioligand therapy, and immunotherapy - enrollment in a clinical trial that is using SOC therapeutic options in these categories is allowed.