Small brush: 2.5mm small brush head is used for sparse mascara and short eyelashes to ensure that they can be applied, and also used for lower eyelid mascara and upper eyelash base makeup to make all eyelashes evenly colored and full Big brush:The large brush head can hide the daily mascara and quickly make up the eyelashes, making the eyelashes more plump and curled 2 IN 1 MASCARA: The design of 2 and 1 facilitates a variety of usage situations and usage scenarios, ensuring that everyone can experience our mascara perfectly WATERPROOF & LASTS ALL DAY: This long lasting mascara promises to make your eyelashes long, thick, and voluminous all day under any condition. It is waterproof and sweat-proof that allows all day long through rain, tears and sweat without smudging or flaking. How To UseApplying mascara is a breeze with our lash building primer. Brush the mascara primer through your upper lashes evenly from root to tip. Wait 30 seconds, and then apply a coat of mascara to your upper and lower lashes, using the molded bristles to define and separate as you go and experience your very own lash growth. Apply another coat for thicker, fuller lashes.