Create fun flirty looks with BYS Mascara. The BYS Blister Mascara range has everything you’re after from Waterproof to full red carpet ready lashes that will last all day long. BYS Mascara is easily applied to enhance and define your lashes. Fuller, thicker lashes are just a few brush strokes away; there are 5 incredible lash styles to choose from, three of which are available in both loose and blister packed form.