This is the VelibU Collagen Bouncing Serum Pad.

It offers dual functionality for whitening and wrinkle improvement. Since the serum pads are made of 100% pure cotton, they wipe gently on the skin, providing care without worrying about irritation. If you place several on your face, it works just like a face mask. I feel like my skin's hydration improves, texture is refined, and elasticity gets better. The moisturizing effect is comparable to a face mask, so I keep it in the refrigerator to use as a substitute. Thanks to the whitening function, I apply it before bed, take it off, and wake up in the morning feeling like my skin tone has brightened. I highly recommend it!