Numbuzin Serum I bought this serum after it was recommended to me during a trip to Korea, but I'm selling it because I prefer another serum. I purchased it six months ago, and it's unopened. Refills are also included. - Brand: numbuzin - Product Name: Panthenol B5 Serum - Contents: 1 bottle and 2 refill sets - Features: Moisturizing and soothing effects - How to use: After washing your face, apply an appropriate amount to your skin. Thank you for looking.