Fills Brows. Lines Lids. Pencil Glide. Blendable Color That Shapes Brows and Defines Eyes. Waterproof and Long Wearing. Contact Lens Safe Allergy Tested Safe for Sensitive Eyes. For a bold brow or dramatic eye, the Maybelline Expert Wear Twin Brow Pencils offer the perfect blendable color that is waterproof and long-lasting for all-day wear.