Nonaerosol/atomizer pumps or aerosol dispensers comprise (A) a reservoir confining at least one vaporizable sunscreen composition suited for UV-photoprotecting the skin and/or hair against the damaging effects of UV radiation, the at least one vaporizable sunscreen composition comprising (1) a UV-photoprotecting amount of at least one UV-sunscreen and (2) an SPF-enhancing amount of generally spherical silica microparticles, formulated into (3) a topically applicable, cosmetically acceptable carrier therefor, and (B) at least one agent for pressurizing the at least one vaporizable sunscreen composition into a spray of fine sunscreen particles.