1. Follow the Sandwich Method strictly in your evening (PM) routine.
2. Prep: Apply Purito Serum to clean, dry skin.
3. Base: Apply a thin layer of ZEROID Cream.
4. Renew: Apply a pea-sized amount of COSRX Retinol (avoid eyes/lips).
5. Seal: Lock it in with a final layer of ZEROID Cream.
6. Morning Shield: Always finish your morning skincare with a generous layer of Beauty of Joseon Relief Sun to protect against increased photosensitivity.
7. Schedule: Use only 2 nights a week for the first 2 weeks. Increase to every other night for weeks 3 & 4. If comfortable, proceed to nightly use.

What it is: A complete, 4-step routine meticulously designed to safely introduce active retinol into your regimen using clinical-grade barrier protection.
Why it works: Retinol is unparalleled for anti-aging, but the irritation often forces beginners to quit. This bundle employs the "Sandwich Method." First, the Purito Centella Serum floods the skin with calming hydration. Next, a thin base layer of ZEROID Intensive Cream provides a protective clinical barrier. The COSRX 0.1% Retinol is then applied, gently stimulating cell turnover. Finally, a second layer of ZEROID seals everything in, guaranteeing you get all the firming and smoothing benefits with absolutely zero redness or peeling. The Beauty of Joseon SPF50+ then protects your newly renewed skin the following morning.

Purito Seoul Wonder Releaf Centella Serum Unscented: Water, Glycerin, Dipropylene Glycol, Propanediol, Centella Asiatica Extract(34,860ppm), Butylene Glycol, Niacinamide, 1,2-Hexanediol, Sodium Hyaluronate, Panthenol, Madecassoside, Asiaticoside, Madecassic Acid, Asiatic Acid, Centella Asiatica Callus Extracellular Vesicles(10ppm), Allantoin, Palmitoyl Tetrapeptide-7, Palmitoyl Hexapeptide-12, Palmitoyl Tripeptide-1, Palmitoyl Dipeptide-10, Carbomer, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Hydrolyzed Jojoba Esters, Tromethamine, Ethylhexylglycerin, Xanthan Gum, Dipotassium Glycyrrhizate, Adenosine, Disodium EDTA, Sucrose Stearate, Glyceryl Stearate, Hydrogenated lecithin, Polyglyceryl-10 Stearate, Ceramide NP, Camellia Sinensis Leaf Extract, Pancratium Maritimum Extract
COSRX The Retinol 0.1 Cream: Water, Caprylic/Capric Triglyceride, Propanediol, Glycerin, Tocopheryl Acetate, Cetearyl Alcohol, Trehalose, Panthenol, Butyrospermum Parkii (Shea) Butter, Glycine Soja (Soybean) Oil, Ammonium Acryloyldimethyltaurate/VP Copolymer, Dimethicone, Glyceryl Polymethacrylate, Helianthus Annuus (Sunflower) Seed Oil, Polyglyceryl-10 Stearate, Hydrogenated Lecithin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Carbomer, Tromethamine, Glyceryl Stearate, Polysilicone-11, Sodium Sulfite, Tocopherol, Daucus Carota Sativa (Carrot) Root Extract, Retinol (0.1%), Allantoin, Glyceryl Caprylate, Oryza Sativa (Rice) Bran Wax, Tocotrienols, Stearic Acid, Polyglyceryl-3 Methylglucose Distearate, Palmitic Acid, Disodium EDTA, Ethylhexylglycerin, Adenosine, Sorbitan Isostearate, Elaeis Guineensis (Palm) Oil, BHT, Beta-Carotene, Myristic Acid, Lauric Acid, Ascorbic Acid, Limnanthes Alba (Meadowfoam) Seed Oil, 3-O-Ethyl Ascorbic Acid, Glutathione, Sodium Hyaluronate, 1,2-Hexanediol, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, Hyaluronic Acid, Sodium Acetylated Hyaluronate
Beauty of Joseon Relief Sun : Rice + Probiotics: Water, Dibutyl Adipate, Propanediol, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Polymethylsilsesquioxane, Ethylhexyl Triazone, Niacinamide, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Coco-Caprylate/Caprate, Caprylyl Methicone, Diethylhexyl Butamido Triazone, Glycerin, 1,2-Hexanediol, Butylene Glycol, Oryza Sativa (Rice) Extract, Oryza Sativa (Rice) Germ Extract, Camellia Sinensis Leaf Extract, Lactobacillus/Pumpkin Ferment Extract, Bacillus/Soybean Ferment Extract, Saccharum Officinarum (Sugarcane) Extract, Macrocystis Pyrifera (Kelp) Extract, Cocos Nucifera (Coconut) Fruit Extract, Panax Ginseng Root Extract, Camellia Sinensis Leaf Extract, Monascus/Rice Ferment, Behenyl Alcohol, Poly C10-30 Alkyl Acrylate, Polyglyceryl-3 Methylglucose Distearate, Decyl Glucoside, Tromethamine, Carbomer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Stearoyl Glutamate, Polyacrylate Crosspolymer-6, Adenosine, Xanthan Gum, T-Butyl Alcohol, Tocopherol, Lactobacillus/Rice Ferment, Aspergillus Ferment, Saccharomyces/Rice Ferment Filtrate, Pentylene Glycol, Ethylhexylglycerin

ZEROID Intensive Cream: Water, Propanediol, Caprylic/capric triglyceride, Glycerin, Cetearyl alcohol, Polyglyceryl-10 distearate, Squalane, Glyceryl stearate, Stearic acid, Bisabolol, Myristoyl/palmitoyl oxostearamide/arachamide MEA(Ceramide), Phytosterols, Cetyl palmitate, Sorbitan palmitate, Dimethicone, Sorbitan olivate, Tocopheryl acetate, Methyl caprooyl tyrosinate(Defensamide), Olea europaea (Olive) fruit oil, Butyrospermum parkii (Shea) butter, Canola oil, Xanthan gum, Sodium hyaluronate, 1,2-hexanediol, Caprylyl glycol