Freezing of gait (FOG) is a common disabling condition in Parkinson's disease (PD), causes falls, and impairs quality of life. Therapeutic options for this symptom are limited and of limited efficacy. Besides, the pathophysiology has been not clarified yet. Proprioceptive sensitivity is likely to play a role and recent studies have reported that high-frequency microfocal vibratory stimulation exert a modulatory effect of proprioceptive reflex circuits and could be considered a valuable treatment strategy. However, evidence is not available. The present study was designed to collect preliminary evidence of efficacy of a vibrotactile device (Equistasi) for the treatment of FOG.