Microdermabrasion has evolved from rocks, stones and shells to crystals, particle-free diamond tips and particle-free bristle tips. Once the desired amount of exfoliation has been reached, some microdermabrasion units will then spray or infuse a skin enhancing solution into the skin. Since microderm essentially manually removes limited layers of the stratum corneum (dead layers of the outer layer of the skin), any serum or topical product applied in any fashion to the skin following microdermabrasion will potentially have a greater opportunity for penetration into the skin.