SPG Marlboro. Clip in hair extensions are as they sound. They are individual strands of hair attached to a simple clip attached to existing hair. The more permanent for hair extensions, we can take more time to install and they can stick to the existing one's hair through several different methods. Some methods are quite involved and that is where the entry fees Imagine how long does it take to sewing accessories hand it to someone's head and make it blend in and look natural. What would happen if we decide we want to delete it? we may cause more damage trying to get them out, and probably will take a lot of time and may even involve such a pain.