This invention relates to ultrasound delivery apparatus comprising flexiblearrays of transducers and to methods and topical compositions for thetreatment of skin, in particular for the treatment of cosmetic skin conditionsand to improve the appearance of sun damaged and/or aged skin; the inventionfurther relates to the use of such apparatus and compositions in methods oftreating skin, which methods may incorporate the application of ultrasound.The composition may comprise one or more anti-gfycation agent, one or moreanti-oxidant, a dermatologically acceptable excipient and optionally one ormore substance capable of inducing expression of a molecular chaperone.