Inclusion Criteria:  Diagnosis of breast cancer and underwent lumpectomy or mastectomy Scheduled for radiotherapy: hypofractionation regimen (16 or 16+5 boost fractions) at the Jessa Hospital (Hasselt, BE) Age ≥ 18 years Able to comply to the study protocol Able to sign written informed consent Signed written informed consent  Exclusion Criteria:  Previous irradiation to the breast region Metastatic disease Patients with pre-existing skin rash, ulceration or open wound in the treatment area Substance abuse patients or patients with medical, psychological or social conditions that may interfere with the patient's participation in the study or evaluation of the study results as judged by the investigator •- Any condition that is unstable or could affect the safety of the patient and their compliance in the study as judged by the investigator