Stretch your lashes to infinity! Thanks to its exclusive Flex Control complex, Smoky Stretch’s smooth formula glides on lashes for incredible length and perfect definition. What type of makeup Stretch your lashes to infinity! Thanks to its exclusive Flex Control complex, Smoky Stretch’s smooth formula glides on lashes for incredible length and perfect definition. How to use Its multi-bristle brush grips lashes starting from the root, covering every single lash for optimal separation. Shorter bristles on the tip work magic on tiny lashes.