Fusion Hair Extensions are the most expensive and longest lasting method as far as how often they need to be done. Fusion hair extensions are attached to your hair by keratin bonds, a keratin bond is heated and then rolled around your hair, once it cools it forms a hard bond. Fusion hair does not get moved up, you can wear the, up to 3-4mos* depending on how fast your hair grows. Maintenance for fusions is keeping the hair nice and neat and not letting it get tangled. You will purchase new hair for each install. Fusions can are pretty invisible once installed and feel the most like your own hair. I am certified through The Hair Shop to do fusions. Pricing for fusions very based on how much hair you need to achieve the look you want. I charge $100 per bundle to install, the average person needs at least 5 bundles for a full head. This does not include the cost of the hair.