WHAT’S IN THE BUNDLE? RÉNERGIE H. C.F. TRIPLE SERUM: expertly formulated with targeted ingredients, represented by the name H. C.F. (hyaluronic acid, vitamin c+ niacinamide, and ferulic acid), a serum is designed to deliver optimal anti-aging benefits in one triple dose. Proven to result in visible improvement of aging signs: firmness, wrinkles, dark spots. RÉNERGIE NANO-RESURFACER 400 BOOSTER refillx6: A set of 6 replacement cartridges for the RÉNERGIE NANO-RESURFACER 400 BOOSTER. Each cartridge features 484 nano-tips that gently create micro-channels on skin surface to help active absorption without damaging the skin barrier. You ll need the RÉNERGIE NANO RESURFACER 400 BOOSTER device to use this cartridge. Each cartridge is designed for one use only.