One sheet. How about it for those who want to try it out! I purchased the authentic product at the esthetic salon I go to. Just leave it on for 10 minutes and rinse for smooth, supple skin. High concentration of carbonic acid 2000ppm Retail price: 1 sheet: 1320 yen 4 sheets: 4400 yen *I'm sorry, but I'm not considering lowering the price. * Although I strive for prompt responses, it may take up to a week to ship due to childcare. Thank you for your understanding. Product Description Gently removes old keratin accumulated on the skin with dense carbonic acid foam. Ultra-fine double carbonic acid softens the skin and efficiently delivers beauty ingredients to the stratum corneum. The low-irritation carbonic acid foam containing beauty ingredients can be used even on delicate skin, leading to fresh, clear, and healthy beautiful skin. Anti-aging care with carbonic acid beauty! ◎ Pore care with ultra-fine bubbles Ultra-fine bubbles are a manufacturing method that creates bubbles smaller than 0.0001mm. Fine bubbles penetrate into pores and between skin texture, making it easier to remove dirt and leading to glossy skin with lasting moisture. ◎ Please use it in addition to your usual care as keratin care after cleansing. ◆ How to use 1. After removing makeup, remove water and apply to clean, dry skin, avoiding the eye and mouth areas. 2. When the dense carbonic acid foam foams white all over the face and the tingling sensation begins, wait for 10 minutes. 3. When the tingling sensation of the carbonic acid subsides, gently massage and rinse thoroughly with water or lukewarm water.