Biodance Bio-Collagen Real Deep Mask 34g × 4 Sheets

K-Beauty's most viral mask — and it earns every view. The Biodance Bio-Collagen Real Deep Mask is the overnight hydrogel mask that took Olive Young, TikTok, and skincare communities worldwide by storm — and with good reason. Selling at a rate of one every two seconds with over one million sales, this is Biodance's best-selling product and one of the most loved masks in all of K-Beauty. The highly concentrated 34g ampoule is not soaked into a sheet but hardened as a hydrogel mask pack — as the skin absorbs the active ingredients, it turns progressively more transparent , showing you exactly how much your skin is drinking in.

Why it works:

243 Dalton Ultra-Low Molecular Weight Collagen — absorbed up to 42 times more efficiently than traditional collagen  — at just 243 Daltons, this is 20,000 times smaller than a strand of hair , ensuring it penetrates deeply into the skin rather than sitting on the surface, refining enlarged pores, improving skin elasticity, and visibly smoothing the appearance of fine lines and wrinkles instantly 

Oligo Hyaluronic Acid (Hydrolyzed Hyaluronic Acid) — provides superior moisturising effects compared to regular Hyaluronic Acid, quickly hydrating the skin's surface while penetrating deeper layers for a healthy, well-moisturised complexion 

Galactomyces Ferment Filtrate — a nutrient-rich fermented yeast derived from sake that nourishes, brightens, firms, and protects skin — one of K-Beauty's most celebrated brightening and anti-ageing ferments, used extensively in professional skincare treatments

3 types of Probiotics (Bifida Ferment Filtrate, Lactobacillus Ferment, Lactobacillus Ferment Lysate) — strengthen the skin's barrier and prevent skin ageing  by rebalancing the skin's microbiome and supporting the natural lipid barrier that keeps moisture in and irritants out

Niacinamide — works with the natural substances of the skin to help even out skin tone, improve dullness, and bolster weakened skin barriers  — adding a complete brightening and barrier-strengthening function within the overnight treatment

Adenosine — clinically proven to reduce the appearance of fine lines and wrinkles by supporting collagen synthesis and improving skin firmness with every use

How to use:

 After completing your full evening skincare routine — cleanse, tone, serum, moisturiser — apply the two-part hydrogel mask to your face, pressing gently to seal to your skin contours. For overnight use: leave on overnight and remove in the morning, then rinse. For daytime use: leave on for 3–4 hours, or until the mask becomes translucent.  Gently pat any remaining essence into the skin. Use 2–3 times per week for best results.

Suitable for: All skin types · Sensitive & acne-prone skin · Dry & dehydrated skin · Anti-ageing & pore concerns · Safe during pregnancy · EWG All Green · Hypoallergenic · Made in Korea 🇰🇷

The Biodance Bio-Collagen Real Deep Mask is the product that made us take hydrogel masks seriously — and once you understand the science behind it, the viral status makes complete sense. At 243 Daltons, Biodance's collagen is well below the 500 Dalton threshold considered necessary for meaningful skin absorption, and the 42x efficiency advantage over conventional collagen is the measurable consequence of that difference.

The transparent-as-it-absorbs phenomenon is also not a marketing gimmick — it is a genuine visual indicator of the formula working. The mask starts opaque because the 34g of concentrated essence is fully saturated in the hydrogel structure. As your skin absorbs the actives, the hydrogel becomes progressively clearer, and the rate at which it turns transparent tells you how deeply your skin is hydrated. Most masks you remove and rinse away with essence still sitting on the surface, unabsorbed. The Biodance mask aims to leave nothing behind — and on well-hydrated, healthy skin it very nearly achieves that.

The three-probiotic system is another detail that separates this from every other collagen mask in its category. Most hydrogel masks focus entirely on delivering one or two hero actives — collagen and HA — and stop there. 

We recommend to keep four in the fridge at all times — use one on Sunday night, wake up Monday looking like you slept ten hours and drank two litres of water. That is the Biodance promise, and it consistently delivers.