Fiber extensions mascara. Instant lash extensions. No flakes. Formula with 4 mm fiber extensions. Fiber-Fix Brush and Sealing Formula work together to optimize with 4 mm fiber extensions for dramatically longer lashes. The Fiber-Fix Brush reaches each lash from different angles for optimal fiber placement. The Sealing Formula visibly stretches lashes and seals the fibers securely to each lash without flaking or breaking. Ophthalmologist tested. Contact lens safe. Made in USA.