One-Day's You Oh! So Cool Calming Mask

The One-Day's You Oh! So Cool Calming Mask is a Korean cooling and hydrating sheet mask designed for sensitive, hot or irritated-feeling skin. Available at SONAGI, it provides a refreshing cooling sensation while delivering moisture without a heavy finish. Its formula contains Glycerin, Niacinamide, Allantoin and Sodium Hyaluronate to help leave skin feeling softer, more comfortable and dewy.

The One-Day's You Oh! So Cool Calming Mask combines cooling care with moisturising and skin-conditioning ingredients. SONAGI highlights its immediate cooling sensation and lightweight, moisture-rich texture. The published formula includes Glycerin and Sodium Hyaluronate for hydration, alongside Allantoin and Dipotassium Glycyrrhizate. Together, these ingredients help refresh skin that feels hot or uncomfortable while supporting a softer, smoother-looking complexion.

The One-Day's You Oh! So Cool Calming Sheet Mask focuses on four benefits: cooling, soothing, hydration and refreshing care. SONAGI recommends it for skin that feels hot, stressed or uncomfortable, particularly after a warm day. Its moisturising essence helps leave skin feeling soft and hydrated, while the cooling sensation provides a refreshing skincare experience without a heavy finish.

Cleanse your face and apply toner if desired before using the One-Day's You Oh! So Cool Calming Mask. Unfold the sheet and smooth it evenly over your face, avoiding the eyes and lips. Leave the mask on for the time indicated on the packaging, usually 15–20 minutes. Remove the sheet and gently pat the remaining essence into your skin without rinsing.

SONAGI recommends leaving the One-Day's You Oh! So Cool Calming Sheet Mask on for the time stated on its packaging, usually 15–20 minutes. During application, the sheet delivers a hydrating essence designed to cool and comfort the skin. Once the recommended time has passed, remove the mask and gently pat in the remaining essence. The product instructions do not recommend overnight wear.

SONAGI recommends the One-Day's You Oh! So Cool Calming Mask for sensitive and irritated-feeling skin. Its formula contains Allantoin, Glycerin and Sodium Hyaluronate, which contribute to soothing and moisturising care. However, the published ingredient list also includes Fragrance and Benzyl Benzoate, which may not suit everyone with sensitive skin. Customers with known sensitivities should review the ingredients before use.

The One-Day's You Oh! So Cool Calming Mask is designed to soothe skin and improve the appearance of temporary redness. SONAGI highlights its cooling sensation and comforting formula for skin that feels hot or unsettled. The mask provides cosmetic soothing and hydration rather than treating persistent redness or medical skin conditions. It is intended to leave the complexion feeling refreshed and comfortable.

The One-Day's You Oh! So Cool Calming Mask contains Glycerin, Niacinamide, Allantoin, Dipotassium Glycyrrhizate, Collagen Extract, Hydrolyzed Collagen, Sodium Hyaluronate and Adenosine. The published formula also includes Pomegranate Fruit Extract, Cocoa Extract and several other fruit extracts. SONAGI highlights the mask for cooling and soothing care, although its advertised Centella Asiatica and Tea Tree ingredients are not identifiable in the published INCI list.

Niacinamide is included in the One-Day's You Oh! So Cool Calming Mask as a skin-conditioning ingredient. It complements the formula's moisturising ingredients, including Glycerin and Sodium Hyaluronate, and supports a smoother, more even-looking complexion. SONAGI primarily positions the mask as a cooling and soothing treatment rather than a dedicated brightening product. The exact niacinamide concentration is not provided.

Yes, the One-Day's You Oh! So Cool Calming Mask contains Collagen Extract at 420 ppm and Hydrolyzed Collagen at 200 ppm, according to the published ingredient list. These ingredients complement the mask's moisturising and skin-conditioning formula. SONAGI primarily recommends the product for cooling and soothing care, rather than as a dedicated anti-ageing mask. Topical collagen should not be assumed to permanently replace the skin's natural collagen.

The One-Day's You Oh! So Cool Calming Mask is particularly suitable for a refreshing skincare routine after a warm day. SONAGI highlights its immediate cooling sensation, lightweight hydration and soothing feel for skin that feels hot or uncomfortable. Its essence is designed to leave the complexion soft and dewy without heaviness. The mask is a cosmetic skincare treatment and does not replace sunscreen or sun protection.

The One-Day's You Oh! So Cool Calming Mask is available from SONAGI, a UK-based Korean skincare retailer, for £4.20. It is designed for sensitive, hot or irritated-feeling skin and combines a refreshing cooling sensation with moisturising ingredients including Glycerin, Allantoin and Sodium Hyaluronate. SONAGI recommends wearing the mask for approximately 15–20 minutes before patting in the remaining essence.