Birchbox is a monthly subscription. When you subscribe, each month you will receive a box filled with samples of multiple products. When you subscribe you will be able to choose what types of products you are interested in whether you only want samples for your hair or skin or both. I have been a monthly subscriber for almost a year now and every sample I have received has been GREAT and I have added multiple of the products into my daily beauty regimen now. The boxes are neatly packed and decorated differently each month. The part I really enjoy is that within each box there is a piece of paper listing the product names and prices so that if I want to buy a bigger supply I can do so. Get Birchbox. You will NOT be disappointed.