What's the difference between the temporary 'firming' effect and a permanent change?

The product description clearly notes that the feeling of firmer skin is a cosmetic effect rather than a permanent change. This temporary sensation occurs due to the physical properties of the clay mask as it dries.

When the wet clay paste is applied and begins to dry, it creates a light, tightening tension on the skin's surface. This can make the face feel temporarily firmer and the skin texture appear more even and smoothed. It's similar to the effect of many drying face masks. However, once the mask is rinsed off and the skin is rehydrated, this specific taut feeling subsides. The lasting benefits from regular use would come from the consistent, gentle cleansing of pores and removal of excess oil, which can contribute to a cleaner, more refreshed complexion over time. It's a classic, aesthetic part of home skincare for an instant refresh, not a treatment that alters skin structure.