If Numbuzin has a signature object it is the toner pad. The brand's No.1 centella pads and No.5 vitamin pads are what most people outside Korea met first, stacked in squat jars with a tweezer clipped in the lid, and when the brand decided in 2026 to open a No.0 line for acne-prone skin the question was never whether there would be a pad, only what it would carry. The answer turns out to be four acids and a second face. The Azela Cica Balancing Dual Pads are Numbuzin doing the thing it is best at, with a harder brief than it has ever set itself.
The brief shows in the list. After water and two glycols comes diethoxyethyl succinate, an unusual solvent, and then tromethamine, and it is the tromethamine that tells you how this pad works: it neutralises the azelaic acid that follows into a salt the watery essence can hold, since raw azelaic acid barely dissolves in water at all. Then gluconolactone, the polyhydroxy acid, then a polyglyceryl solubiliser and the salicylic acid it carries, then hydroxyethylcellulose to give the essence enough body to cling to a pad. Deep in the tail sit centella extract, a trace of hypochlorous acid, and finally the four titrated centella fractions, asiaticoside, madecassoside, asiatic and madecassic acid. Twenty ingredients, no fragrance, no alcohol, no oil. It is a very clean list for what it is trying to do.
The design is the part that makes sense of it. One side of each pad is embossed with a raised weave; the other is smooth. You sweep the textured side over the oily zones first, and it does the mechanical lifting while the salicylic and polyhydroxy acids get to work on the pore lining and the surface. Then you flip it and the smooth side lays the same essence down flat, which is when the centella and the humectant glycols read as a soothing step rather than an exfoliating one. It is a small piece of engineering but it turns a single jar into the exfoliate-then-calm sequence that acne-prone skin usually has to assemble from two products, and in practice it is the reason the pads feel far milder than a four-acid label implies.
Mildness, in fact, is the story. The essence is thin and faintly slippery, there is a light tingle on the cheeks for the first few days that fades, and the skin is left matte and smooth rather than tight. Oily and combination skin will take a pad every day without complaint. The blackhead effect is real and arrives on the usual salicylic acid timetable, two to three weeks of daily use before the nose and chin look noticeably clearer, and the polyhydroxy acid keeps the surface soft along the way. What the pads do not do particularly well is anything dramatic to an inflamed pimple, which is not their job; the line has a sulfur spot cream for that.
Now the reservations. Numbuzin has not published a percentage for any of the four acids, and on a product whose entire premise is its actives that is a real gap. The azelaic acid is neutralised and sits seventh; a fair reading is a low cosmetic dose, which is fine for daily use but a long way from the 10% serums people associate with the ingredient and further still from prescription strength. The salicylic acid is tenth, below its own solubiliser, which on a leave-on product almost certainly means under the half percent the acne monograph starts at. That is not a flaw so much as a design choice for daily tolerability, but it means the azelaic-and-BHA billing describes mechanisms, not doses, and buyers deserve to know which. The hypochlorous acid is the one inclusion that reads as fashion rather than function. It is a genuinely useful antimicrobial when sold alone and protected from light and other ingredients; buried in a jar of organic extracts and citric acid, its stability over months is doubtful, and its presence should not be read as a disinfecting step.
The second reservation is fit. Propylene glycol is the second ingredient, which a minority of people react to, and any pad that combines two exfoliating acids with a textured swipe is going to be too much for dry, eczema-prone or rosacea-prone skin regardless of how gentle the doses are. The centella second face softens the landing but it does not change who the product is for.
On price, twenty-four dollars for sixty pads is at the top of the K-beauty pad range and a couple of dollars above Numbuzin's own No.1 and No.5 jars. Used daily that is a two-month supply, which is acceptable for a leave-on with four actives and a fragrance-free, alcohol-free base, but the brand is five years old, has no independent clinical record, and the undisclosed percentages make the premium harder to justify than it should be. There is only the one size.
So: a good pad, a well-conceived one, and one that is better than the sum of its marketing. Oily or combination skin that gets blackheads and the occasional spot, wants a daily step that does not sting and does not want to juggle an exfoliant and a calming toner, will get on with this very well and will probably keep the jar. Anyone with dry or reactive skin, anyone expecting serum-level azelaic acid, and anyone who wants to know exactly what they are putting on their face before they pay for it, should wait for Numbuzin to publish the numbers, or look elsewhere.
