Everyone is unique with different expectations and durability while wearing their lash extensions.
In order to keep your lashes looking amazing; I recommend for you to come back for regular maintenance.
Myself and quite a few clients prefer the one-week touch up. This refill is recommended to those who want to ensure that their lashes remain full and luscious on a consistent basis.
Most clients will opt for the 2 week or 3 week time frame. Ever day we shed around 2-4 natural eyelashes with new natural lashes replacing the old. These new lashes will require extensions to maintain the full gorgeous lush look.
And occasionally, some clients can go a full 4 weeks between refills. At least 40 percent of your lash extensions must be remaining to classify as a refill .
After the 4th week a new set of lashes will be required.