Fusion Ktip Hair Extensions are the most expensive and longest lasting method as far as how often they need to be done. Ktip 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 and your hair type (fine, medium, course). Maintenance for ktip fusions is keeping the hair nice and neat and not letting it get tangled. You may need to purchase new hair for each install or sometimes hair can be re-tipped and re-used, but that greatly depends on at home care*. Ktips  are virtually invisible once installed and feel the most like your own hair. I am certified through The Hair Shop to do kitps fusions. Pricing for ktips vary 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, and 2-3 for a volume set. Full head installs are when you want to add more than 2+inches of length and fullness to your hair and pricing usually starts around $800+for the hair and install; Volume sets is when you want to add fullness to your existing length or less than 2" of length, Volume sets start at $400+ for hair and install.