The present invention provides a composition for application to keratin fibers, preferably hair, more preferably the hair of the scalp, eyebrows and eyelashes, and most preferably the eyelashes. The composition comprises a post-foaming gel containing a film forming agent and, optionally, a colorant, preferably a pigment. The present invention also provides a method for imparting a volumizing effect to hair of the scalp, eyebrows or eyelashes.