Hair systems are installed using medical-grade adhesives that bond the system to your natural hair and scalp. The installation process takes about an hour and is done by a trained stylist. They clean and prepare your scalp, position the hair system, and apply bonding adhesive to secure it in place. Properly installed systems can remain securely adhered for 4 to 6 weeks before needing reattachment. Some men prefer to have their systems removed and reinstalled more frequently for increased security and to allow the scalp to breathe.