Isoi
isoi is a Korean brand built around gentle, naturally-derived skincare for reactive, easily-irritated skin. The ATO and Atocaring line is the heart of it: the ATO Smile Oil and the Atocaring Cream are made for dry, atopic-prone skin that flares at the first sign of a harsh formula. Around that sit the targeted pieces, like the Core Elasticity Serum and the Intensive Energizing Cream for firmness, the Eye Cream for the delicate eye area, and the Moisture Zip for quick hydration. The masks, including the Sika SOS Mask Pack and the Eraser Pack, handle short rescue treatments, and there is a Foreman line for men too. We list 170+ products, so pick by what your skin can tolerate and the formulas stay gentle about it.
By Skinsli editorial Updated
Buying guide
The isoi range, explained
isoi is a Korean skincare brand with a clear focus: gentle, naturally-derived formulas for skin that reacts to almost everything else. The catalogue here runs across sensitive-skin care, masks, hydration, firming serums, eye care, and a men's line. We list 170+ products, so this guide walks through the families and helps you pick the right one for how your skin actually behaves.
What isoi is about
isoi makes low-irritation skincare aimed at reactive, easily-upset skin. The brand leans on naturally-derived ingredients and keeps its formulas gentle, which is why it gets recommended for people who flare up at fragrance or strong actives. If your skin tightens, stings, or goes red the moment you try something new, isoi is built for you. Read the whole range through that lens: it looks after the barrier before it reaches for anything stronger.
The ATO and Atocaring line (sensitive, atopic-prone skin)
This is the core of the brand. The ATO Smile Oil is a gentle facial oil for very dry, atopic-prone skin, and the Atocaring Cream is the rich, comforting moisturiser that pairs with it. Reach for this family when your skin is dry, flaky, or prone to eczema-style irritation and needs calming more than it needs anything clever. These are your daily barrier-support steps rather than treatments.
Masks and rescue treatments
For short, targeted help, isoi has a couple of mask options in this grid. The Sika SOS Mask Pack is the one to reach for when skin needs a quick calming reset, and the Eraser Pack works as a focused treatment step. Use these as a top-up a few times a week rather than daily, layering them in when your skin feels stressed, dull, or in need of a boost before an event.
Hydration with Moisture Zip
The Moisture Zip is the lightweight hydration step in the range, a quick way to add moisture without heaviness. It suits skin that feels dehydrated but does not want a thick cream, and it layers easily under the rest of your routine. Think of it as the in-between option when the Atocaring Cream feels too rich but bare skin feels too tight.
Firming and intensive care
For firmness and a more treatment-led routine, isoi has its intensive pieces. The Core Elasticity Serum targets bounce and resilience, while the Intensive Energizing Cream and the Intensive Perfect Program step things up for skin that wants more than basic moisture. Bring these in once your barrier is calm and comfortable, since firming care works best on skin that is not already irritated.
Eye care
The Eye Cream is built for the thinner, more delicate skin around the eyes, where richer face creams can feel heavy. Pat a small amount around the orbital bone in the morning and evening, and let it absorb before makeup. It is a gentle, everyday step rather than a quick fix, so consistency matters more than how much you use.
The Foreman line for men
isoi keeps a men's routine simple with the Foreman line. The Foreman Moisture Doctor All-in-One bundles the basics into a single step, so it hydrates and conditions skin after cleansing without a long regimen. It is an easy entry point if you want isoi's gentle approach but prefer to keep the bathroom shelf short. Start here and add from the wider range if your skin needs more.
How to choose across the range
Match the family to how your skin behaves.
- Dry, atopic-prone, easily irritated: the ATO Smile Oil and Atocaring Cream.
- Dehydrated but does not want weight: Moisture Zip.
- Stressed or dull skin needing a reset: the Sika SOS Mask or Eraser Pack.
- Loss of firmness: Core Elasticity Serum or the Intensive line.
- Delicate eye area: the Eye Cream.
- A simple men's routine: the Foreman Moisture Doctor All-in-One.
Buying genuine isoi
As with any popular K-beauty brand, buy from the brand or a trusted stockist, check the batch code and expiry, and treat prices far below the usual range with suspicion. You can browse the full isoi range here to compare the lines side by side and confirm you are getting the formula you expect.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
What is isoi known for?
Gentle, naturally-derived Korean skincare for reactive, easily-irritated skin. The ATO and Atocaring line for dry, atopic-prone skin is its best-known family, and the formulas are made to calm rather than provoke.
I am new to isoi. Where should I start?
If your skin is dry or reactive, start with the Atocaring Cream and the ATO Smile Oil, the brand's core sensitive-skin steps. If you mainly want light hydration, the Moisture Zip is an easy first try.
Is isoi suitable for very sensitive skin?
That is the whole point of the brand. isoi formulates for skin that flares at fragrance or strong actives, with the ATO and Atocaring line aimed squarely at atopic-prone, easily-irritated skin. Patch test anything new, but the range is built to be gentle.
What is the ATO Smile Oil for?
It is a gentle facial oil for very dry, atopic-prone skin. Use it to seal in moisture and calm tightness, ideally paired with the Atocaring Cream as your daily barrier-support routine.
Atocaring Cream or Moisture Zip, which moisturiser?
Choose the Atocaring Cream if your skin is dry and needs rich, comforting moisture, and the Moisture Zip if you want lightweight hydration without weight. Some people use the Zip in summer and the cream in winter.
When should I use the Sika SOS Mask or Eraser Pack?
Use them as short rescue treatments a few times a week, not daily. Reach for the Sika SOS Mask when skin needs a quick calming reset, and the Eraser Pack as a focused treatment step before an event or after a rough skin day.
Which isoi products help with firmness?
The Core Elasticity Serum targets bounce and resilience, while the Intensive Energizing Cream and the Intensive Perfect Program step up to a more treatment-led routine. Introduce them once your barrier is calm, since firming care works best on skin that is not irritated.
What is the Foreman Moisture Doctor All-in-One?
It is isoi's all-in-one men's product, bundling hydration and conditioning into a single step after cleansing. It is the easy entry point if you want isoi's gentle approach without a long routine.
How do I layer isoi in a routine?
Cleanse, then your lightest steps first: Moisture Zip or a serum, then the Eye Cream, then a richer moisturiser like the Atocaring Cream, with the ATO Smile Oil last to seal everything in. Add a mask a few times a week as a top-up.
Can I use isoi on eczema-prone or atopic skin?
The ATO and Atocaring line is designed with atopic-prone skin in mind, focusing on calming and barrier support rather than actives. It is not a medical treatment, so see a doctor for diagnosed eczema, but many people use it to keep dry, reactive skin comfortable.