Balmain Prebonded Fill-in Extensions Human Hair Natural Straight 40cm 50pcs are prebonded extensions made of high quality 100% Human Hair. The hair is connected to the natural hair by using a small keratin bond and connector tool. The natural straight textures ensures perfect and instant integration with the natural hair. The special Fill-In Value Pack edition (50 pcs.) equals a basic volume service. Contains: 50 pcs. (length: 40 cm), 2 protectors.