HALO is a hybrid fractional laser, meaning it combines two different laser wavelengths in a single device. Specifically, it pairs a non-ablative 1470 nm wavelength with an ablative 2940 nm wavelength, delivering them sequentially during treatment. This dual-wavelength approach is what sets HALO apart from traditional laser resurfacing systems, which use only one type of laser energy at a time.
How Two Wavelengths Work Together
The word “hybrid” is the key to understanding HALO. Traditional skin resurfacing lasers fall into two camps: ablative lasers, which vaporize the outer layer of skin, and non-ablative lasers, which heat deeper tissue without breaking the surface. Each has trade-offs. Ablative lasers produce dramatic results but require lengthy recovery. Non-ablative lasers heal faster but deliver subtler improvements.
HALO uses both. The 2940 nm wavelength is an erbium laser that ablates, or vaporizes, tiny columns of tissue in the epidermis (the skin’s outer layer). The 1470 nm wavelength penetrates deeper without removing surface tissue, instead heating and coagulating columns in the dermis to stimulate collagen production. Both wavelengths are delivered in a fractional pattern, treating only a fraction of the skin’s surface while leaving surrounding tissue intact. This fractional approach is what allows the skin to heal relatively quickly, since the untreated tissue acts as a bridge for repair.
The combination means HALO can address surface-level concerns like pigmentation and texture at the same time it triggers deeper remodeling for fine lines, pore size, and skin laxity. A provider can adjust the ratio of ablative to non-ablative energy depending on your skin’s needs and how much downtime you’re willing to accept.
What HALO Treats
The dual-wavelength design makes HALO effective across a broad range of skin concerns. It’s commonly used for sun damage, age spots, melasma, uneven skin tone, rough texture, fine lines, wrinkles, enlarged pores, shallow acne scars, and general skin laxity. The ablative wavelength breaks up excess pigment and resurfaces the outer skin, while the non-ablative wavelength works underneath to tighten and rebuild collagen structure.
HALO vs. Traditional CO2 Lasers
Fractional CO2 lasers have long been considered the gold standard for skin resurfacing, but clinical comparisons suggest the hybrid approach holds its own. In comparative data, hybrid fractional lasers reduced wrinkles by 78% versus 60% for CO2, improved sun damage pigmentation by 88% versus 75%, and improved acne scarring by 80% versus 65%.
The recovery difference is significant. Average downtime for hybrid procedures was about 4.3 days compared to 7.3 days for CO2 treatments. Redness cleared within one week for over 90% of hybrid patients, while only about 36% of CO2 patients saw the same quick resolution. Visible results from HALO typically appeared within 7 to 8 weeks, compared to roughly 3 months for CO2. For many people, this faster recovery with comparable or better outcomes is what makes the hybrid approach appealing.
What Recovery Looks Like
Immediately after treatment, your skin feels warm and tight, similar to a sunburn. Redness and mild swelling are normal in the first few hours. Over days one and two, puffiness may increase, particularly around the eyes and cheeks, and the skin starts to feel rough or sandpapery.
This rough texture comes from something called MENDS: microscopic epidermal necrotic debris. These are tiny dark specks, essentially dead skin cells pushed to the surface as the skin heals. They appear around days two through four and begin flaking off between days three and five, revealing fresh pink skin underneath. By the end of the first week, most peeling has stopped and the skin looks noticeably smoother and brighter.
What you see at one week isn’t the final result. Internal collagen remodeling continues for months, and most patients notice progressive improvement in tone, clarity, and texture for up to 12 weeks after a single session.
How Long Results Last
Improvements in texture and tone typically remain noticeable for a year or more with good skincare habits. Sun protection is critical for preserving results, since UV exposure is the primary driver of the pigmentation and collagen breakdown that HALO corrects. Most providers recommend maintenance treatments every 12 to 18 months to sustain the refreshed appearance long-term.
Skin Tone Considerations
Because HALO’s ablative wavelength targets the epidermis, melanin in the skin absorbs some of that laser energy. People with darker skin tones (Fitzpatrick skin types IV through VI) face a higher risk of post-treatment pigmentation changes, including darkening or lightening of treated areas. This doesn’t mean HALO is off-limits for darker skin, but it does mean the treatment needs to be approached more carefully. Providers typically use lower energy settings and reduced treatment density. Pre-treatment and post-treatment use of skin-lightening agents can also reduce the risk of pigmentation complications. If you have a medium to dark complexion, working with a provider experienced in treating deeper skin tones is especially important.