This study is evaluating whether a therapeutic ultrasound device can improve symptoms in the leg of peripheral arterial disease (PAD) patients 65 years of age and over.

The VibratoSleeve TUS will be used on to assess its acute vasodilatory and perfusion effects in subjects with early stage PAD. Each subject will receive TUS treatment multiple sessions. All post- treatment acute assessments will take place immediately following each day's treatment and no follow-up assessments will be required in this study.

Inclusion Criteria:

1. Age ≥ 65
2. Diagnosis of PAD.
3. Claudication symptoms in Rutherford class 1,2, or 3 as determined by the investigator.

Exclusion Criteria:

1. Prior stenting in posterior tibial artery.
2. Re-vascularization procedure within 30 days prior to enrollment in the study.
3. Ulcers, cellulitis, or skin breakdown in treatment areas (posterior calf).
4. History or diagnosis of severe chronic venous insufficiency.
5. Acute limb ischemia within 30 days prior to treatment.
6. History or diagnosis of deep venous thrombosis below the knee in treatment leg.
7. Any conditions that, in the opinion of the investigator, may render the subject unable to complete the study or lead to difficulties for subject compliance with study requirements, or could confound study data.
8. Subject's enrollment in another investigational study that has not completed the required primary endpoint follow-up period.

stenting in posterior tibial artery.