Our Hyaluronic Acid Face Serum contains hyaluronic acid, hydrolyzed collagen, glycerin. It penetrates deep into the skin, locks in moisture, keeps skin moisturized and smooth for a long time, and after use, your skin will feel hydrated and full, with reduced fine lines and a healthy glow. Its application method is very simple: thoroughly clean the skin, dry first, open the bottle cap of the hyaluronic acid serum, install the 64-needle roller head above the serum bottle, roll the roller evenly on the skin surface, and evenly apply the microneedles to the facial skin. Each use lasts 15-20 minutes. It can moisturize and lock water for a long time, provide a long term moisturizing effect, and keep the skin hydrated and full.