Is this a bottled serum or a sheet mask?

It's a serum-soaked wrapping sheet mask that you place over your face and remove after use, not a bottled leave-on serum.

How long should I leave it on, and what do I do with the remaining serum?

Leave the sheet on for 10–20 minutes, then remove it and gently press or pat the remaining serum into your skin. Finish with moisturizer and apply SPF when using the mask in the morning.

How often can I use the mask?

Use it two to three times per week, or whenever your skin looks dull or uneven.

Does the serum leave a sticky finish?

The after-feel is fresh, comfortable and luminous without stickiness.

Which skin types is this mask intended for?

It's intended for normal, dry, oily, combination and sensitive skin.

Does the mask address texture as well as dull-looking tone?

Yes. It helps visibly brighten dull-looking tone, while PHA and LHA gently exfoliate dead skin and excess sebum for a smoother, more even-looking surface.

Which forms of vitamin C are in the formula?

The formula contains 3-O-Ethyl Ascorbic Acid and Ascorbic Acid. The 99% figure refers to the purity of Mediheal's vitamin C raw material, not its concentration in the finished mask.

Does the ingredient list contain aromatic plant oils or floral waters?

Yes. The ingredient list includes geranium flower oil, galbanum resin oil, lemon seed oil, geranium water, rose flower water and eucalyptus leaf water.