XERF dual-frequency radiofrequency

XERF is a monopolar radiofrequency device made by Cynosure Lutronic. It launched in South Korea in 2024 and was FDA-cleared in the US in 2025. Unlike older radiofrequency devices that use one frequency, it fires two (2 MHz and 6.78 MHz) in the same pulse, so heat reaches shallow, middle and deep layers of skin. The heat tightens existing collagen straight away and triggers new collagen over the following months. A cryogen spray cools the surface, and the device reads your skin's resistance in real time to adjust energy. The hype comes largely from Korean clinics and celebrity posts, including Kim Kardashian.

Warm to hot pulses with cold bursts in between. Most people have it without numbing cream; some find the jawline and bony areas sharp at the highest settings. A face takes around 30–45 minutes.

How much downtime: Low — None. Mild redness for an hour or two.

Cost for that downtime: $1,500–$4,000 per face in the US (much cheaper in Korea), 1–2 sessions, then maintenance once a year.

Is it worth it? Our verdict (3/5): Promising and genuinely comfortable, but it's still mostly hype plus before-and-after photos. Expect subtle-to-moderate firming, not a lift. Worth trying only if you've budgeted for a subtle result; otherwise wait for better evidence or compare with RF microneedling.

• Some immediate firming, improving over 2–3 months
• Tightening of the jawline, under-chin, brows and neck
• More comfortable than Thermage for most people
• Back to normal life the same day

• Replace a facelift or lift heavy sagging
• Treat pigmentation or redness
• Show long-term results yet: independent studies are still very few

• Temporary redness, swelling or tenderness
• Rare burns, blisters or fat loss if settings are too high
• Results vary a lot, and long-term data is missing

Darker skin tones: Generally safe for all skin tones because radiofrequency doesn't target pigment. Choose an experienced provider to avoid burns.

Good fit

• Early to moderate laxity in your 30s–50s
• People who want tightening with zero downtime and no needles

Avoid or ask a doctor first

• Pacemakers or implanted electronic devices
• Pregnancy
• Significant sagging better suited to surgery

Typical cost: $1,500–$4,000 per face in the US (much cheaper in Korea) (USD, varies by city and provider)

Sessions: 1–2 sessions, then maintenance once a year

• Cynosure Lutronic — XERF (manufacturer)
• Allure — I tried XERF (review)
• TODAY — Dermatologists on XERF
• American Academy of Dermatology — Non-surgical skin tightening

General information only, not medical advice. Consult a qualified dermatologist.