The super slim glide-on pencil helps to easily mimic individual baby hairs to fill in the tiniest of brow gaps for pinpoint precision. This award-winning, best-seller makes application easy & foolproof, blending easily for natural-looking defined brows. Enriched with natural anti-ageing antioxidants, Vitamin E & C to nourish & care for your brows with every application. Complete with fully retractable nib, the BBB London Ultra Slim Brow Definer is fully waterproof & smudge proof. Perfect for on-the-go application. Vegan, cruelty-free.