Round Lab Islets
The ROUND LAB 1025 Islets line extends the brand's deep sea water formula into a large-format, hydration-first system. The toner alone comes in 350ml and 500ml options - the 500ml is one of the largest toner formats in Korean skincare - and the lotion ships in a 400ml bottle. The line covers cleansing (150ml and 250ml cleanser, Cleansing Milk 200ml, Cleansing Tissue 30 sheets), treatment (Ampoule 45g), and masking (Islets Mask, Moisture Watergel Mask). The Islets name references the volcanic rock formations in the sea around Korea, tying back to the 1025m deep sea water sourcing concept.
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Buying guide
ROUND LAB 1025 Islets Line Guide
The ROUND LAB 1025 Islets line takes the brand's deep sea water formula and builds it into a large-format hydration routine. Where the 1025 Dokdo line focuses on a complete facial system at standard sizes, the Islets line emphasizes generous product quantities - a 500ml toner, a 400ml lotion, and multiple cleanser size options - designed for families, consistent daily users, or anyone who wants to avoid restocking constantly. This guide covers each product, how the sizes compare, and how the Islets line relates to the broader ROUND LAB 1025 range.
The Islets Name and the 1025 Ingredient
"Islets" references the small volcanic rock formations and island clusters in the waters around Korea, specifically the sea environment near Dokdo. The 1025 designation, as in the Dokdo line, refers to the 1,025-meter depth from which the sea water is sourced. At that depth, the water carries a concentrated mineral profile - magnesium, potassium, calcium, and other trace elements - with low biological activity.
The Islets line is not a replacement for the Dokdo line; they share the same foundational deep sea water ingredient and the same brand rationale. The Islets line appears as a large-format, family-scale offering within the same mineral-hydration framework. If you have used the 1025 Dokdo Toner and want to shift to a larger bottle without changing the formula direction, the Islets Toner is the natural next step.
Islets Toner in 350ml and 500ml
The 1025 Islets Toner is available in two sizes: 350ml and 500ml. A 500ml toner is notably large by any market standard - at once-daily use, two applications per day, a 500ml bottle lasts three to four months. The 350ml size sits between the standard 200ml Dokdo Toner and the 500ml jumbo option, giving you a middle ground if you want more than a standard bottle without committing to the largest format.
The toner applies after cleansing as a first hydration layer. The Islets formula maintains the pH-appropriate range that characterizes the 1025 line. Pat the toner onto clean skin using hands or a cotton pad. The larger bottle size does not change the formula - it is the same product at a different volume, which makes restocking less frequent and often reduces per-milliliter cost.
Three Cleansing Options: 150ml, 250ml, and Cleansing Milk
The Islets line covers cleansing across three formats. The 1025 Islets Cleanser comes in 150ml and 250ml - both are standard facial cleansers, with the 250ml being the larger restocking option. The 1025 Islets Cleansing Milk (200ml) adds a milk-texture format, which is a cream or lotion cleanser that emulsifies on contact with water. Milk cleansers are typically gentler on dry skin than foam cleansers because they do not require the same level of surfactant activity to rinse clean.
Choose the 150ml cleanser for travel or to test the formula. The 250ml is the practical daily-use size. The Cleansing Milk is the better option for dry or lipid-compromised skin that finds foam cleansers too stripping, especially in winter months.
Islets Cleansing Tissue 30 Sheets
The 1025 Islets Cleansing Tissue (30 sheets) provides a quick cleansing option without water. Pre-soaked cleansing tissues work as a makeup removal or surface-cleansing step - they are not a replacement for a full double cleanse, but they are useful for travel, post-gym use, or quick evening routines when a full face-wash is impractical. Thirty sheets is roughly a month's supply at once-daily use.
The Islets formula in the tissues means you get the mineral hydration from the 1025 deep sea water even during quick cleansing, which reduces the dryness that standard micellar or alcohol-based cleansing wipes can leave behind.
Islets Lotion 400ml: Large-Format Moisturizer
The 1025 Islets Lotion at 400ml is the largest moisturizing product in the Islets line. A 400ml lotion bottle provides four to five months of twice-daily full-face application for a single user - equivalent to buying two to three standard-size Korean face lotions back to back. This format makes economic sense when you have confirmed the Islets lotion formula works for your skin and want to simplify your restock cycle.
The lotion texture sits lighter than a cream, making it appropriate for daily use on normal to oily skin or as the morning moisturizer on dry skin before sunscreen. It applies after the toner and any ampoule as the final hydration layer, sealing in the mineral essence from the steps below.
Islets Ampoule 45g: Concentrated Treatment
The 1025 Islets Ampoule (45g) delivers a concentrated version of the Islets mineral complex as a treatment step between toner and moisturizer. Ampoules carry higher active concentrations than standard serums and are applied in smaller amounts - two to three pumps or drops per application. At 45g the bottle holds a two to three month supply at daily once-a-day use.
The Islets Ampoule addresses skin that needs an extra layer of hydration beyond what the toner and lotion alone provide - particularly skin that is dehydrated from climate, frequent washing, or barrier disruption. Adding an ampoule step adds about thirty seconds to a routine and can noticeably improve how well subsequent moisturizer layers absorb and perform.
Islets Mask and Moisture Watergel Mask
Two masking products appear in the Islets assortment: the 1025 Islets Mask and the Islets Moisture Watergel Mask. The Islets Mask is a standard sheet mask soaked in Islets formula essence. It applies to clean skin, stays on for the indicated time, and deposits a concentrated layer of hydration. The Watergel Mask is a gel-format leave-on or wash-off mask - gel textures provide a cooling, quick-absorbing moisture layer without the weight of cream masks.
Masks in the Islets line are the highest-intensity hydration step available in the range - useful after periods of skin stress (dry weather, heavy travel, illness) or before an event where you want maximum skin plumpness. Use the sheet mask for an instant one-time treatment; use the Watergel Mask as a lighter overnight option that can be left on.
Islets vs Dokdo: How the Two Lines Compare
Both the 1025 Islets and 1025 Dokdo lines share ROUND LAB's core deep sea water ingredient and the same pH-appropriate formulation approach. The functional differences are in format and size. The Dokdo line is a complete facial system with standard sizes - 200ml toner, 80ml cream, 30ml eye cream, 45ml ampoule - suited for a single user's routine. The Islets line prioritizes volume: 350ml or 500ml toner, 400ml lotion, multiple cleanser options, and a cleansing tissue format the Dokdo line does not have.
If you want the full Dokdo facial system including eye cream and sleeping pack, the Dokdo line is the more complete option. If you go through toner and lotion quickly, share products with a partner or family member, or want to reduce restocking frequency, the Islets sizes make more sense. The lines are compatible - using a Dokdo ampoule with an Islets toner, for example, is not a conflict.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
What is the difference between the ROUND LAB 1025 Islets and 1025 Dokdo lines?
Both lines use ROUND LAB's 1025m deep sea water ingredient and the same pH-appropriate formulation approach. The Dokdo line offers a complete facial system at standard sizes, including eye cream, sleeping pack, and mist. The Islets line focuses on large-format volumes - a 500ml toner, a 400ml lotion, multiple cleanser sizes, and cleansing tissues. If you want the full Dokdo routine with specialized steps, go Dokdo. If you want the same formula in larger bottles to reduce restocking frequency, choose Islets. The two lines are compatible and can be mixed.
Is the 1025 Islets Toner 500ml worth buying vs the 350ml?
At 500ml the toner bottle lasts three to four months at twice-daily use - roughly double the lifespan of the 350ml. The per-milliliter cost on the 500ml is typically lower. Buy the 500ml if you have confirmed the formula works for your skin and you use toner daily without fail. Buy the 350ml if you want to test the Islets line before committing to the largest bottle, or if you prefer smaller containers for hygiene or storage reasons.
When should I choose the 1025 Islets Cleansing Milk over the gel cleanser?
Choose the Cleansing Milk (200ml) if your skin is dry, lipid-compromised, or tight after washing. Milk cleansers emulsify with water and rinse clean without the stripping action of foam-forming surfactants. Choose the gel cleanser (150ml or 250ml) if your skin is normal to oily and responds well to standard foam cleansing. Both maintain the pH-appropriate Islets formula base, so the cleansing step stays compatible with the toner that follows.
Are the 1025 Islets Cleansing Tissues suitable for travel?
Yes. The 30-sheet pack is a convenient travel format that eliminates the need for a separate liquid cleanser bottle for short trips. Each tissue is pre-soaked with the Islets formula, so you get the mineral hydration alongside the cleanse. They function as a surface-cleansing or makeup removal step - for a full cleanse, follow with a rinse or a second cleansing step if you are wearing heavy coverage. At 30 sheets per pack, the supply covers a full month of once-daily use.
How long does the 1025 Islets Lotion 400ml last with daily use?
At twice-daily application (morning and evening) for a single user covering the face and neck, a 400ml lotion lasts approximately four to five months. This is roughly equivalent to buying two to three standard Korean face lotions of 100-150ml each. If you apply more generously or use it on the neck and chest, expect three to four months. Store with the cap tightly closed - large-format bottles can dry out slightly around the pump or nozzle over time if left open.
Where does the 1025 Islets Ampoule fit in a routine?
Apply the Islets Ampoule (45g) after your toner has absorbed and before your lotion or moisturizer. Use two to three pumps pressed into the skin with your palms. The ampoule step is optional - add it on days when your skin needs extra hydration support beyond what the toner alone provides, or consistently if your skin tends to be dehydrated. At daily once-a-day use, the 45g bottle lasts about two months.
What is the Islets Moisture Watergel Mask and how does it differ from the Islets Mask?
The Islets Moisture Watergel Mask is a gel-format mask - either leave-on or wash-off - that delivers a cooling, quick-absorbing hydration layer. The standard Islets Mask is a sheet mask soaked in Islets essence. Use the sheet mask for an intensive one-time treatment with concentrated essence contact time. Use the Watergel Mask as a lighter, more regular option - it suits use two to three times per week without feeling heavy or requiring a long wait time on the skin.
Is there a formula difference between the 1025 Islets Cleanser 150ml and 250ml?
No. The formula is the same in both sizes - only the quantity differs. The 150ml is the travel-friendly or test size. The 250ml is the everyday use size that lasts longer between purchases. At standard daily double-cleansing use, 250ml provides roughly three to four months of supply for one person.
Are ROUND LAB 1025 Islets products on skinsli genuine Korean imports?
Yes. Skinsli sources ROUND LAB products directly from verified Korean distributors and imports them from South Korea. All Islets products match domestic Korean formulations and are not regionally repackaged.