Semi-permanent eyelash extensions are wonderful because they are completely low-maintenance. First of all, you cannot get the eyelash extensions wet for 24 hours after the treatment. Also, you cannot use any oil based makeup removers or products on the lashes or around the eyes. What's more, the best care for these lashes is to just keep the eye area clean, which is why they are so great – you will revel in the time it saves you in the morning when you pop out of bed looking bright-eyed as though your mascara and eye makeup is already done!