XERF (Zerf) Lift in Korea: How It Compares to Thermage

XERF (Zerf, ザーフ / 세르프) is a radiofrequency (RF) lifting device launched in Korea in 2024, and it is often described as "a less painful Thermage." Its built-in cooling system sprays cooling gas up to 12 times per shot, which is why many patients are reported to complete the treatment without anesthesia, and event pricing in Korea tends to run lower than Thermage for the same number of shots. If you are planning cosmetic treatments during a trip to Korea and have been hesitating over lifting procedures because they seem painful or expensive, XERF is one of the newest options worth understanding before you book a consultation.

That said, XERF is a new device. Long-term clinical data is still limited, and fewer clinics offer it compared to established devices like Thermage. This guide was created based on interviews with multiple clinics in the Gangnam (강남) area of Seoul, with details confirmed directly by doctors and counselors. We cover how XERF works, how it differs from Thermage and 10THERMA, what it costs in Korea, what the pain and downtime feel like, and exactly what to ask during your consultation.

Hesitating over lifting treatments because of pain or cost? Read this first

Many readers tell us the same thing: they are interested in RF lifting, but they cannot take the first step because of two concerns — pain and cost. Thermage has an established reputation, but it is also known for being uncomfortable and carrying a higher price tag. That is exactly the gap that XERF (Zerf) Lift is trying to fill.

XERF is an RF (radiofrequency) lifting device launched in Korea in 2024. Nicknamed "a less painful Thermage," it has been gaining popularity especially among first-timers, because it is often more affordable than Thermage while working on the same basic principle of collagen stimulation.

Two technical features differentiate XERF from Thermage: its cooling system and its dual-frequency technology. However, because the device is new, long-term data is still limited — and we will be upfront about that trade-off throughout this article rather than glossing over it.

Editor's note: Everything in this guide is based on interviews with multiple clinics in the Gangnam area and direct confirmation from doctors and counselors. We did not rely on manufacturer marketing materials alone.

What kind of device is XERF (Zerf) Lift?

XERF (Zerf) Lift is a lifting device that delivers RF (radiofrequency) energy deep into the skin to promote collagen production. As collagen rebuilds over the following weeks and months, skin gradually tightens and lifts.

Its basic mechanism is the same as Thermage. The real differences lie in two areas: the design of its cooling system and its energy efficiency. Understanding these two points is the fastest way to decide whether XERF fits your priorities.

① What is the cooling system?

XERF features a cooling system that sprays cooling gas up to 12 times with each shot. The cooling counteracts the heat sensation of the RF energy at the moment it fires.

As a result, many people are reported to be able to undergo the treatment without anesthesia. Individual results vary, of course — pain tolerance is personal — but this is the single feature most often cited by clinics when explaining why patients choose XERF over Thermage.

② What is dual-frequency technology?

XERF uses two frequencies simultaneously: 6.78MHz + 2MHz.

The 6.78MHz frequency targets fine lines and skin texture improvement, while the 2MHz frequency works simultaneously on nasolabial folds and facial contour improvement. In other words, one pass is designed to address both surface-level texture and deeper contour concerns at the same time.

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XERF vs Thermage vs 10THERMA: an in-depth comparison

All three devices have radiofrequency lifting in common. The key factors in choosing between them are your pain tolerance, your budget, and the type of results you prioritize — proven long-term data versus newer technology at a lower price point.

Factor	XERF (Zerf)	Thermage	10THERMA
Technology	RF, dual frequency (6.78MHz + 2MHz)	RF	RF
Pain	Cooling gas up to 12x per shot; many report no anesthesia needed (varies)	Tends to be more painful	Characterized by low pain
Track record	Launched 2024; long-term data limited	Years of clinical data; proven results and longevity	Depends on clinic experience
Cost tendency	Often lower for the same shot count	Often higher	Varies by clinic

XERF (Zerf) vs Thermage: which fits your priorities?

Thermage has years of clinical data and is currently superior in terms of proven results and longevity. If your top priority is choosing a device with an established track record, Thermage remains the reference point in RF lifting.

On the other hand, Thermage tends to be more painful, and the cost is often higher than XERF. XERF is less painful for many people thanks to its cooling system (individual results vary), and the cost for the same number of shots tends to be lower. However, because XERF launched in 2024, long-term clinical data is limited — that is the trade-off you are accepting in exchange for the lower price and gentler experience.

▶ Want the full picture on the alternative? See our Complete Guide to Thermage.

XERF (Zerf) vs 10THERMA: how do you choose?

10THERMA is also a radiofrequency device characterized by low pain, which makes it a natural comparison for anyone drawn to XERF for the same reason.

It is difficult to make a blanket judgment about whether XERF or 10THERMA is superior. The right choice depends on the clinic's experience with each device and on your individual skin condition. Consulting a doctor or counselor — ideally one who works with both devices — is an important basis for making this decision.

▶ Not sure how to pick a clinic in Seoul? See our Tips for Choosing a Korean Dermatology Clinic.

XERF Lift pricing in Korea: 300 shots vs 600 shots

Based on event prices on the Gangnam Unni (강남언니) app, 300 shots start in the low-800,000-won range, while 600 shots start in the low-1.4-million-won range. These are promotional event prices in Korea, so what you see at an individual clinic may differ.

Compared with Thermage for the same number of shots, XERF is often more affordable on average. For travelers combining a trip to Seoul with a cosmetic treatment, this price gap is one of the main reasons XERF keeps coming up in consultations.

Points to check when confirming the cost

Prices vary depending on the clinic and treatment area, so it is worth checking with multiple clinics before committing. Also note that anesthesia fees and additional options may be charged separately — the advertised event price is not always the final number, so ask for the all-in total during your consultation.

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Pain, downtime, and how long the results last

Treatment time and downtime

The treatment usually takes 30–45 minutes, and no more than 60 minutes at most. You can apply makeup and go out immediately after the treatment, with virtually no downtime. For travelers, this means an XERF session can realistically fit into a sightseeing itinerary without writing off the rest of the day.

How the pain feels

Thanks to the cooling gas system, many people are reported to be able to undergo the treatment without anesthesia. However, individual experiences vary — some patients still find the heat sensation uncomfortable, so discuss your pain tolerance honestly during the consultation.

Duration of results

The results are said to last an average of 6–12 months.

Depending on your skin condition and lifestyle, the effects may feel shorter, lasting 3–6 months, and treatment once or twice a year is commonly considered. If you visit Korea regularly, that cadence can align well with annual or twice-yearly trips; if this is a one-time visit, factor the maintenance question into your decision.

Precautions and consultation questions to check before treatment

XERF is a new device launched in 2024. As a result, relatively few clinics currently offer it, and long-term clinical data is still insufficient. This does not mean the device is a poor choice — but it does mean you are choosing newer technology whose track record is still being built.

If you want to assess longevity of results and safety over the long term, it is realistic to also consider proven devices such as Thermage, and to weigh both options side by side with your doctor rather than deciding from marketing alone.