Lululun Hydra AZ vs EX: Which mask should you choose?
Which should you choose?
Choose Hydra AZ if you want a hydrating mask aimed at roughness and an oily feeling. Choose Hydra EX if dryness and a plumper looking finish matter more. AZ contains an azelaic acid derivative. EX puts more emphasis on moisture and elasticity.
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For roughness and an oily feeling
Lululun Hydra AZ Mask
Hydra AZ combines potassium azeloyl diglycinate, an azelaic acid derivative, with niacinamide and hydrating ingredients. Consider it if you want moisture alongside the range’s focus on roughness and skin balance.
For moisture and a plumper look
Lululun Hydra EX Mask
Hydra EX is the more relevant choice when you want a moisture focused mask. The US ingredient list includes ceramides NP and AP, squalane and a hyaluronic acid derivative. Choose it for that moisturizing role.
What changes between AZ and EX?
| Question | Hydra AZ | Hydra EX |
|---|---|---|
| What is the main focus? | Roughness, moisture and an oily feeling | Moisture and a plumper looking finish |
| Which ingredients help distinguish it? | Potassium azeloyl diglycinate, niacinamide and mandelic acid | Ceramides, squalane and a hyaluronic acid derivative |
| Where does it go? | After cleansing, in the lotion step | After cleansing, in the lotion step |
Neither name tells you that one is universally stronger or better. Choose around the result you want from a sheet mask.
Does Hydra AZ contain azelaic acid?
The ingredient named on the official list is potassium azeloyl diglycinate, an azelaic acid derivative. That distinction matters if you arrived here looking for the same formula as a serum labelled 10% azelaic acid. Lululun doesn’t give an equivalent percentage for this mask.
AZ also contains niacinamide and mandelic acid. If you avoid niacinamide, AZ won’t fit that preference. If your routine already has an exfoliating step, there’s no need to add AZ simply because its name mentions a familiar ingredient.
What about the exosome claims on EX?
Lululun markets EX around elasticity and a radiant look, with exosome language on its product pages. The Japanese and US pages don’t present identical ingredient lists, so we haven’t used that language as proof of a particular delivery effect.
For choosing between these two, the practical reason to consider EX is its moisturizing formula. You don’t need to believe a regeneration claim to decide whether a hydrating mask fits your routine.
How do you use them?
Use one mask after cleansing, following the timing on your pack. Remove it before it dries out and gently pat in the remaining liquid. Follow with your usual moisturizer if needed.
You can use a mask as your lotion step rather than automatically applying a separate hydrating toner first. There’s also no reason to stack AZ and EX in the same session. Choose one for the routine you want that day.
For the other ranges, see our Lululun mask guide.
Common questions
Is Lululun Hydra AZ a 10% azelaic acid mask?
No 10% azelaic acid claim is given on the official pages we checked. The listed ingredient is potassium azeloyl diglycinate, an azelaic acid derivative.
Does Lululun Hydra AZ contain niacinamide?
Yes. Niacinamide appears on the official US ingredient list, alongside potassium azeloyl diglycinate and mandelic acid.
Should I use Hydra AZ and EX together?
You don’t need both in the same session. Pick one mask, use it according to the pack directions, then finish your usual routine.
Sources
We compared published product information. This is a research guide, not a personal wear test. Sources checked October 5, 2026.