Written from Busan, Korea. Some links are affiliate links — we may earn a commission at no cost to you. Disclosure
Sheet Masks

Biodance Bio-Collagen Real Deep Mask

overnight maskhydrogelturns transparent4-pack
Biodance Bio-Collagen Real Deep Mask

Product photo from the Olive Young Korea listing (바이오던스 리얼 딥 마스크 7매 기획 (콜라겐/세라놀)).

Why it's on the Korean shelf

A regular in Olive Young Korea's top 30. The overnight hydrogel mask that goes on milky and turns clear as it absorbs — the single most-filmed K-beauty product of the last two years, and still on the Korean shelf.

Who it's for

Dry or dull skin before an event; sleep-in mask users.

Honest note

Needs 3+ hours (ideally overnight) to work; it is not a 15-minute mask.

Price check

WherePrice
Olive Young Korea shelf (promo, KRW)₩28,900 ≈ $21.09
Typical US street price$19–27

KRW converted at ~₩1,350/USD. Korean promo bundles often include 2 units.

Also carried by Olive Young Global (Korean bundles, does not ship to the US) and Olive Young US. We earn nothing on these two — they are listed because they are sometimes the better buy.

Same category

Mediheal · Sheet Masks

Essential Mask Sheet (Tea Tree / Madecassoside / Collagen)

A permanent fixture on Olive Young Korea's overall ranking, usually as a 10+1 box around ₩10,000. Mediheal has been Korea's #1 sheet mask for 15…

sheet mask10-pack15-year #1 in Korea
Korea shelf ₩10,000 ≈ $7US $12–22

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