Enrolled subjects will receive one bilateral Ulthera® treatment on the knees. Up to 30 subjects will be enrolled. Study photos will be obtained prior to study treatment, immediately following study treatment, and at each post-treatment follow-up visit. Follow-up visits will occur at 90 and 180 days post-treatment.

This pilot study is a prospective, single-center clinical trial of the Ulthera® System for treating skin laxity on the knees. Global Aesthetic Improvement Scale scores and Patient Satisfaction questionnaires will be obtained at each follow-up visit.

Inclusion Criteria:

• Female, aged 30 to 65 years.
• Subject in good health.
• Mild to moderate skin laxity around the knees.
• Understands and accepts the obligation not to undergo any other procedures in the areas to be treated through the follow-up period.

Exclusion Criteria:

• Presence of an active systemic or local skin disease that may affect wound healing.
• Excessive subcutaneous fat around the knees.
• Excessive skin laxity around the knees.