Tirtir

TIRTIR's numbering runs from lighter to deeper shades with N (neutral), W (warm), and C (cool) undertone variants — matching both depth and undertone matters more than depth alone, so check your undertone before choosing between similarly numbered shades.

The dedicated SPF50+ PA+++ version does; the standard Mask Fit Red Cushion has its own formula without added sun protection, so check the listing before assuming either way.

Yes — vitamin C serum in the morning under sunscreen, with the Ceramic Milk Ampoule layered in whenever the skin needs extra barrier support, works well as a combined routine.