Spa treatment RET i-Micro PatchThis sheet type serum uses microneedle technology to mold serum ingredients into needle shapes. Based on "hydrolyzed hyaluronic acid*2," it contains pure retinol*3 and Syn Ake*4. After application, it dissolves within the stratum corneum over the course of approximately 40 minutes, providing a firming, hydrating, and plump feeling. Recommended for those concerned with skin that has lost its firmness due to UV damage*5 or skin problems caused by facial