This is a leave-in treatment from MEDULLA ☺︎ It is a brand new, unopened item ˚✧₊⁎ ⚪︎How to Use⚪︎ Apply about 2 pumps to towel-dried, wet hair. It is recommended to leave it on for about 4 minutes before using a hair dryer once a week. MEDULLA HYPER LINK SERUM 55mL ************* ・Please understand that this item is stored at home. ・The shipping method may be changed to Rakuraku Mercari Delivery. Please note that the delivery will still be anonymous. ・Shipping is scheduled within 7 days from the purchase date. If you are in a hurry, please contact us before purchasing ˚✧₊⁎ *************