Patch test required 24hrs prior the individual eyelash extensions give you natural and unique look as each lash is applied individually you can choose the look thickness and length to create the effect you want you can have the set as one off or keep filling then in every 2 3 weeks the lashes will shed when the natural lashes themselves fall out as normal cycle the lashes are ideal when you are going for a holiday and do not want to wear mascara or want to have ongoing glamorous look t