Selling because I don't use it. [Features a Special Structure Brush]: This product employs a specially designed brush that can work on both the eyelashes and their roots, enabling effective care. [How to Use]: Apply the serum to the entire eyelashes twice a day, morning and night, as if applying mascara, and then use the tip of the special brush to blend it into the eye area. CO Long Lash Rich is an eyelash serum that approaches from three directions: "Protect Care" to protect and condition eyelashes; "Lash Care" to care for damage and lead to fresh-looking eyes; and "Rich Care" to support the firmness and resilience of eyelashes from the roots. It keeps eyelashes healthy with a three-pronged approach. Furthermore, the brush has a special structure that works on both the eyelashes and their roots. Brand new, unused, and available for immediate purchase. Please note that I cannot be held responsible for postal accidents. *Please refrain from purchasing if you are overly sensitive. *No claims will be accepted after purchase.