MAC Eye Brows Big Boost Fibre Gel Genuine Aubergine 0.14oz 4.1g Tinted Brow Gel MAC Eye Brows Big Boost Fibre Gel in the shade Genuine Aubergine provides a long-wearing, smudge-proof formula designed to give brows a voluminous, full-bodied appearance. This tinted gel is infused with small synthetic microfibers that mimic natural hair to build thickness and define the brow shape. The lightweight, waterproof formula ensures a sweat-resistant finish that stays in place for up to 24 hours without flaking or stiffening. Housed in a compact tube with a precision brush, it allows for effortless application and grooming, making it an essential tool for achieving bold, textured brows with a natural-looking dimension. 0.14 oz / 4.1 g.