Koy Volume

KoY's Solid Volume line uses protein-based actives to address skin volume loss - the gradual thinning and loss of firmness that comes with reduced collagen and elastin over time. The concept is that protein-rich formulas can help restore a plumper, bouncier skin texture over repeated use, similar to how protein supplements support muscle tissue.

The "Solid" in the name signals density rather than a solid (non-liquid) texture: the products are standard liquid and cream formats. The line spans toners, ampoules, and creams, all using the same central active complex, so layering within the line builds on itself.

Two toners anchor the beginning of the KoY Solid Volume routine. The Volume Base Toner (100ml) - listed also as Volume Base Stoner (100ml), an alternate transliteration - is a lightweight hydrating prep step that applies the first layer of the Volume complex to freshly cleansed skin. The Solid Volume Base Milk Toner (100ml) is a slightly richer, milky-texture alternative for drier skin that wants more emolliency at the toner stage.

Both are 100ml bottles. Use whichever texture your skin responds to better: the standard toner for oily or normal skin, the milk toner for dry or dehydrated skin. Either one prepares the skin for the ampoule that follows.

The Solid Volume Ampoule (35ml) is the main treatment step in the KoY line. Ampoules in Korean skincare deliver a higher concentration of actives than toners, applied after toning and before moisturiser. The Protein Cream Solid Volume Ampoule (35ml) is a variation in the same range that adds a protein cream texture alongside the concentrated treatment.

The 35ml size is a standard ampoule format that typically lasts four to six weeks with daily use of two to three drops per application. Both the plain Solid Volume Ampoule and the Protein Cream variant target the same concern - skin firmness - but the Protein Cream version has a richer finish suited to drier skin.

The Solid White Volume Ampoule comes in two sizes on skinsli: 10ml and 35ml. The "White" designation in Korean skincare typically refers to brightening actives targeting uneven skin tone and dullness. The Solid White variant adds a brightening dimension to the core Solid Volume formula, making it the right choice if you want to address both skin firmness and skin luminosity in the same step.

The 10ml size is the trial or travel option. The 35ml is the full-use size. If you are new to the KoY Solid Volume line and want to try the brightening ampoule before committing to the full bottle, starting with the 10ml makes sense.

The Solid Volume Core Cream (50ml) is the moisturiser in the KoY Solid Volume system. Applied after the ampoule, it seals in the treatment and adds an emollient layer. The Core Cream uses the same Solid Volume complex as the rest of the line, so layering toner → ampoule → Core Cream keeps the protein active present at each step.

At 50ml, the Core Cream provides a standard one to two months of daily use for most skin types. Apply a pea-sized amount and press into skin rather than rubbing to maintain the plumping effect of the formula.

The Solid Volume Body Ampoule (250ml) takes the KoY protein-plumping concept beyond the face. At 250ml it is a substantial body treatment applied after showering in the same way as a body lotion. Skin on the arms, legs, and décolletage loses volume and firmness with age in ways similar to facial skin, and the Body Ampoule is designed for that broader application.

The Body Ampoule format sits between a serum and a lotion in texture - richer than a facial ampoule but lighter than a conventional body butter. For people already using the KoY Solid Volume facial range who want consistent actives across face and body, this is the product to add.

A complete KoY Solid Volume routine from the skinsli collection follows a standard Korean skincare layering order, lightest to heaviest: Volume Base Toner (or Base Milk Toner) → Solid Volume Ampoule or Solid White Volume Ampoule → Solid Volume Core Cream. Morning and evening use is fine for all three steps.

If budget requires choosing one product, the Solid Volume Ampoule (35ml) is the most concentrated treatment and the one most likely to show results on its own. The toner prepares the skin for better ampoule absorption, so adding that as a second step is worthwhile if you want to extend the routine. The Core Cream is the final lock-in step for dry skin types who need extra moisture on top of the treatment.

KoY Solid Volume products on skinsli come in a few consistent sizes: 100ml for toners, 35ml for ampoules (with a 10ml trial size for the Solid White variant), 50ml for the Core Cream, and 250ml for the Body Ampoule. The 10ml Solid White Volume Ampoule is a genuine trial size that lets you assess the formula before committing to the 35ml bottle.

All products ship from Korea to the US via skinsli at USD pricing. For a treatment-focused range like KoY Solid Volume where you might want to complete a full bottle before judging results, buying the full 35ml ampoule rather than the 10ml makes more sense unless you are specifically trialling the white variant alongside an existing ampoule.