Get the lash extension effect without the commitment Rimmel Wonder'Extension Mascara is a lash-lengthening mascara that gives the effect of lash extensions, leaving full, long and defined lashes. Formula is built with stretchy texture extends beyond the tips of your lashes. Lash grabbing brush lifts and extends as it lengthens. Clump-free, long lasting, smudge-proof, flake-proof and easy to remove.