The study will produce novel information of cardiovascular responses to short-term cold exposure among untreated hypertensive men. This knowledge will help health care personnel to advice hypertensive patients to protect themselves during habitual cold exposure, which could reduce the adverse cardiac events related to the cold weather. This knowledge is useful for medical doctors when considering medication for their patients. In addition, hypertensive people may need advice for their proper protection to reduce cold-related changes in cardiovascular function, such as blood pressure increases, and the related adverse cardiovascular events in cold climates.