Anua Birch Moisture Mask 25ml
📦 Order today and it ships from Sydney within 1 to 3 business days.
60-day money-back guarantee · Free shipping over $59 ($4.95 flat under)
4.9 out of 5 · 515 reviews
By 3pm your skin feels tight, and you've already topped up moisturiser twice. Between the office aircon, the winter heating and days when the air seems to pull the water straight out of you, some skin needs more than a daily cream — it needs a weekly hydration reset.
Anua's Birch Moisture Mask is built around birch sap — the Korean and Nordic hydration hero naturally rich in xylitol, a humectant that pulls water deeper into skin than synthetic ones can. Paired with hyaluronic acid and barrier-supporting botanicals, it's the once-a-week saturation hit that resets your hydration baseline for the week ahead.
20 minutes while the house is quiet — a moment that's yours. Wake up hydrated from the inside out, looking a little less tired than the night before. The weekly fix for the chronically-dry who've tried everything else.

The Alina Promise
Try one sheet. If your skin doesn't feel hydrated and look plumper the next morning, email me. Refund or swap.
Sheet masks deliver results in one use. If you woke up and your skin still felt tight, that's on me — refund or swap the next one, no return needed.
Email hello@alinabeauty.com.au — I personally reply within 24 hours.
— Edwina, founder
"Sydney summers are tough on skin — aircon all day at the laptop, wind on the school run, sun even when it's overcast. I'd be reaching for face mist by mid-afternoon. This is my Sunday night reset. One 20-minute mask and my skin holds hydration through Wednesday without me topping up every hour. It's not a moisturiser replacement; it's the weekly amplifier that makes the moisturiser I already use actually do its job."
— Edwina, Founder
Benefits
Birch sap — the natural humectant the lab can't replicate
Birch sap is naturally rich in xylitol, minerals, and amino acids. Xylitol is a clinically-studied humectant that pulls water deeper into the upper skin layers than glycerin can — and unlike glycerin, it doesn't draw moisture out of skin in dry air. This is why traditional Korean and Nordic skincare uses birch sap for chronic-dry-skin cases.
The hydration baseline reset
Daily moisturisers maintain. They don't reset. If your skin's started the week below its hydration baseline, your moisturiser is fighting a losing battle. This mask saturates skin to capacity in 20 minutes — raising your baseline so your daily routine has something to actually maintain.
Plumping you can see the next morning
Fine lines from dehydration (the ones around the under-eye and around the mouth) look meaningfully softer the morning after. Makeup goes on differently. Foundation doesn't settle into dry texture. The "I slept ten hours" look that you actually got from a sheet mask, not eight hours of sleep.
Sensitive-skin safe — even with chronic dryness
Anua's formulation philosophy: short ingredient list, no synthetic fragrance, no alcohol, no essential oils. Dry-skin types often have a compromised barrier — the last thing you need is an irritating mask while you're trying to repair. This is the gentle one.
Pairs with the rest of the Anua family
If you're using Anua's Heartleaf Toner (calming) or Niacinamide TXA Serum (daily brightening), this slots in as your weekly hydration amplifier. Same brand formulation philosophy, designed to layer cleanly. Your Sunday-night hydration boost on top of your daily Anua workhorses.
What's in this mask
The hero
Birch (Betula Platyphylla Japonica) Sap
The clear liquid collected from birch trees in early spring. Naturally contains xylitol (a powerful humectant), 17 amino acids, minerals (manganese, magnesium, calcium), and antioxidants. Used in traditional Korean and Nordic skincare for centuries specifically for chronic-dry-skin cases. The dose in this mask is high enough that it's the second-listed ingredient on the INCI — not a marketing-only trace.
The hydration stack
Multi-Molecular Hyaluronic Acid
Different molecular weights of hyaluronic acid penetrate to different layers of skin — small molecules go deep, large molecules sit on the surface as an occlusive seal. The combination delivers hydration at multiple skin depths simultaneously. Paired with birch sap, you get both immediate and longer-lasting moisture binding.
The barrier supporters
Panthenol + Allantoin + Botanical Hydrators
Panthenol (provitamin B5) strengthens the barrier and accelerates barrier repair. Allantoin calms and softens. The supporting botanical hydrators round out the formula without adding fragrance or essential-oil irritants. The result: a mask that hydrates AND repairs the barrier at the same time.
Why this over a hydrating cream
Daily cream maintains. Weekly mask resets the baseline.

How to use it
After cleanse + toner. Apply. 20 minutes. Pat in residue.

Step 1
Cleanse + tone
Cleanse and tone as normal. Skin should be slightly damp — not wet, not dry. Lightly tap toner in before the mask goes on.
Step 2
Apply the sheet
Unfold the sheet, align with your eye + mouth holes, smooth out air bubbles. Push the edges into the contours of your face so it sits flush.
Step 3
20 minutes — lie down
Gravity does the work. Lying down keeps the mask in contact with skin. Don't go past 20 minutes — once it dries, it pulls moisture back.
Step 4
Remove + pat in residue
Remove the sheet. Don't rinse. Pat the leftover essence into face + neck + chest + hands. Pouch will have leftover — use it. Continue with moisturiser.
Frequency: 1–2 times a week is the standard rhythm. During winter or aircon-heavy weeks, 3 times a week is fine.
Questions answered
How is this different from a regular hyaluronic acid mask?
Standard HA masks use only hyaluronic acid as the humectant — which actually has a downside: in dry air, HA can pull moisture out of your skin instead of into it. Birch sap's natural xylitol is a more stable humectant that doesn't have this issue. The combination of birch + HA delivers the immediate plumping AND the longer-lasting hydration without the dry-air backfire.
How is this different from your other Anua masks?
The Anua Green Lemon Vit-C mask is for post-acne marks and brightening. The Anua Peach 70 mask is for tired, dull skin and weekly glow resets. This Birch Moisture mask is for chronic dehydration and barrier repair. Pick by what your skin needs this week — many regular sheet-maskers rotate between them based on what their skin is asking for.
Is this safe during pregnancy?
Yes — no retinoids, no salicylic acid, no essential oils, nothing on the pregnancy-flag list. Pregnancy-friendly across all trimesters and breastfeeding. Always patch-test if you have known reactivity — pregnancy can change skin sensitivity unexpectedly. Run any new product past your GP or obstetrician first.
Can I use this with retinol, AHA, BHA?
Yes — this is actually a great "recovery" mask the night after a strong-actives night. Many people sheet mask the night after retinol to calm the barrier. Layer it as the last hydration step, then moisturise on top. Just don't do strong-actives AND mask in the same evening; let them work separate nights.
I have oily skin — will this make me break out?
No. Oily skin is often dehydrated skin in disguise — over-producing sebum to compensate for a compromised barrier. A weekly hydration reset can actually reduce oiliness over time by signalling to your sebaceous glands that the barrier is intact. This mask is light enough for combo and oily skin, and the formula is non-comedogenic.
When will I see results?
Immediate: next-morning plumping and softer texture, visibly. Short-term: 2–3 weeks of consistent weekly use, your daytime hydration starts holding longer (you reach for moisturiser less). Long-term: 6–8 weeks, your "baseline" skin feels less tight even before the first morning sip of water.
Do I rinse after?
No — never rinse a sheet mask off. The leftover essence is the active product. Pat it into your skin and continue with moisturiser. The pouch will have meaningful leftover essence — use it on your neck, chest, and the backs of your hands.
Why now
Ships from Sydney in 1–3 days. Not from Korea in 21.
Birch sap and the plant actives degrade with heat. Stocked in Australia means yours hasn't sat in a customs container for three weeks. Fresh essence, fresh date code, full hydration potency.
Here's what comes with your order
Every order, no exceptions, no upsell.
- Anua Birch Moisture Mask (1 sheet, 25ml) $6.50
- Free shipping (orders over $59) FREE
- "If it doesn't work, refund or swap" promise INCLUDED
- Personal product matching via email with Edwina INCLUDED
- 1% donated to Cerebral Palsy Alliance Australia EVERY ORDER
Key details
Key ingredients: Birch Sap (Betula Platyphylla Japonica), Multi-Molecular Hyaluronic Acid, Panthenol, Allantoin, Botanical Hydrators
Free from: Synthetic fragrance, alcohol, essential oils, parabens
Best for: Chronic dry skin, dehydration, barrier-compromised skin, aircon + winter weather
Pregnancy: Safe
Usage: 1 sheet per use. 20 minutes max. 1–2 times a week. 3x weekly during chronic dry spells.
Size: 1 sheet, 25ml essence per pack
Ships from: Sydney, Australia — 1–3 business days