Description: Build 4mm of measurable extensions! Features: Fiber-fix brush has 6 different contact points with each lash for optimal fiber placementBreakthrough formula contains fibers up to 4mm in lengthSealing formula stretches lashes and seals fibers to lashesWashable, also available in waterproof formula For Best Results: Extend lashes upward with Fiber-Fix brush, from root to tip. Only a few strokes necessary. For best results, do not let dry between coats. Removes easily with soap and water or Maybelline® Expert Eyes® 100% Oil-Free Eye Makeup Remover.