This Benefit Cosmetics Fan Fest Mascara Booster Set includes a full-size and mini Fan Fest fanning and volumising mascara. Achieve a full-fan effect with this longwearing formula, designed to fan out lashes side-to-side, amplify volume, and multiply the look of lashes. The custom-engineered Full-Flex Fiber Brush helps create a 24-hour full-fan effect. An instrumental test on 27 participants confirmed the 24-hour effect.