One Days You Oh So Cool Calming Mask

A rapid-cooling mask for overheated skin after the shower

This is a cica cell mask powered by 4th-generation hydrogel coating technology. The sheet is infused with centella asiatica extract all the way through the fiber, allowing it to adhere seamlessly to every contour of your face and help active ingredients absorb more effectively. Clinical testing confirmed that just one use lowered skin temperature by an average of -7.38°C (up to -10.1°C). Instead of menthol, it uses a cooling agent with a lower risk of allergic reaction, making it gentle enough for sensitive skin. Dermatologist-tested for skin irritation.

An ingredient blend that delivers both soothing and hydration

The triple cooling mechanism targets both surface heat and deeper warmth in the skin.

Kelp Extract 500ppm absorbs excess heat and releases it outward, while preventing moisture loss to deliver hydration and a calming effect. Trehalose 1,500ppm draws in moisture and locks it in to keep skin from drying out. Centella Asiatica Extract, Tea Tree Leaf Extract, and Houttuynia Cordata calm sensitized skin and support the skin barrier.

Panthenol, hyaluronic acid, and betaine are also included to replenish deep hydration and restore oil-moisture balance. The formula also contains a patented blend for acne improvement and immune support, featuring lotus leaf extract, yeast ferment filtrate, and cryptomeria leaf extract.

Reach for it whenever heat or redness flares up

Perfect for cooling down flushed skin after a shower, prepping skin quickly before makeup, or calming intense redness and heat. It also helps on days when enlarged pores and excess sebum cause makeup to lift. After cleansing, apply the sheet to your face, leave on for 15 to 20 minutes, then remove and gently pat in any remaining essence.

Apply right after your shower, while skin is still warm

Use this mask right after cleansing or showering, when your skin temperature is elevated, to fully experience the -7.38°C cooling effect. Lightly prep your skin with toner, then apply the mask immediately. It's especially effective after summer outings or workouts, when skin feels overheated and needs instant soothing relief.

Remove after 15–20 minutes and pat in

Smooth the sheet onto your face, adjusting it to fit your contours with no gaps. Leave on for 15–20 minutes. As the hydrogel-coated sheet dries down, you may notice a subtle lifting effect. Once you remove the mask, gently pat any remaining essence into your skin with your palms.

How to use it by situation

• Before makeup: Refines enlarged pores and controls excess oil for smoother, longer-lasting makeup application
• When redness flares: Quickly cools down heat and helps restore skin's calm
• Before bed: Use as a final step to release accumulated heat from the day and recharge hydration overnight

Layer it into your calming routine

For amplified soothing benefits, prep skin with a cica-infused toner before masking. Follow up with a lightweight moisturizer to seal in hydration. On days when your skin feels reactive, skip harsh exfoliants and reach for this mask instead to gently calm and comfort.

Refrigerate for an extra cooling boost

Store unopened masks in the fridge to intensify the cooling sensation. Once opened, use immediately. Keep in a cool place away from direct sunlight. Avoid use on children under 3 years old or on broken skin.

Water, Dipropylene Glycol, Glycerin, 1,2-Hexanediol, Hydroxyacetophenone, Panthenol, Butylene Glycol, Trehalose, Betaine, Eclipta Prostrata Leaf Extract, Laminaria Japonica Extract, Disodium EDTA, Methyldiisopropylpropionamide, Carbomer, Fructooligosaccharides, Portulaca Oleracea Extract, Allantoin, Xanthan Gum, Sodium Hyaluronate, Tromethamine, Polyglyceryl-10 Laurate, Camellia Sinensis Leaf Extract, Hydrogenated Lecithin, Beta-Glucan, Hydrolyzed Hyaluronic Acid, Artemisia Princeps Leaf Extract, Centella Asiatica Extract, Hamamelis Virginiana (Witch Hazel) Extract, Fagopyrum Esculentum (Buckwheat) Extract, Melaleuca Alternifolia (Tea Tree) Leaf Extract, Trifolium Pratense Flower Extract, Cetraria Islandica Extract, Erythritol, Madecassic Acid, Asiaticoside, Nelumbo Nucifera Leaf Extract, Saccharomyces Ferment Filtrate, Cryptomeria Japonica Leaf Extract, Asiatic Acid

The list of ingredients is subject to change. Please consult the packaging of the product purchased.