Most acne cleansers work by stripping. This one doesn't, and that's the whole point.
Salicylic acid is oil-soluble, which is why it's the right acid for acne — it can get inside an oily, clogged pore and break up the plug. Glycolic acid and other AHAs are water-soluble and only work on the surface.
What makes this formula unusual is the ceramides. Ceramides are the lipid mortar of your skin barrier, and acne treatment routinely destroys it — which is how people end up with skin that's both breaking out and raw and stinging. Putting ceramides in the cleanser means you're repairing the barrier at the same time as treating the acne.
Gentle enough for daily use, which matters, because consistency is what actually clears acne.