Emem is thrilled with the Killer Liner Gel Eyeliner Pencil in Sapphire color by Too Faced. She describes it as a stunning navy blue shade that can be used to line the eyes or in the waterline. The versatility of this product allows for various eye makeup looks. Emem mentions that the eyeliner has impressive long-lasting power, claiming it can stay put for up to 36 hours. Although she hasn't tested it for that long, she confirms that it lasted a full 24 hours without smudging. This feature is particularly beneficial for those living in humid climates like Miami. Emem highly recommends this eyeliner for its beautiful color, longevity, and smudge-proof formula.