What It Is: Refill for this weightless, fluid serum for diamond-brilliant skin. What It Does: This is a refill that fits into your existing Brilliance Serum glass bottle. For diamond-brilliant skin: More flawless. Radiant. Unforgettable. Like a diamond, your skin's unique beauty arises from a stunning surface plus a youthful structure. Powered by Estee Lauder's Black Diamond Truffle Extract and SIRTIVITY-LP™ technology, this extraordinary serum helps fortify skin for a firmer feel and a visibly more perfected surface. The transformative result: 94% of women improved* on Estee Lauder's Diamond-Brilliant Skin Score, an assessment of skin's improvement in Radiance, Spots, Pores, Even Tone, Firmness and Elasticity. Stunning Surface. In clinical testing**, after just 2 weeks: Skin looked more radiant and even-toned Dark spot intensity looked reduced Pores looked reduced Youthful Structure. In clinical testing**, after just 2 weeks: Elasticity was improved Skin felt firmer, stronger With continued use, lines looked -21% reduced.*** The transcendently weightless, delightfully indulgent fluid absorbs quickly to refresh skin and help restore a plumper, smoother feel. With every touch, your diamond-brilliant skin awaits. Exclusive Black Diamond Truffle Extract: From a single master grower in the southwest of France come fresh, never-frozen whole truffles from the best, "Extra Class" grade. Harvested at the season's peak. Extracted within days for maximum potency. The power of each truffle is unlocked through an intricate process of fine-milling and ultra purification, commissioned by Re-Nutriv. Estee Lauder's exclusive Black Diamond Truffle Extract has been shown through in vitro testing to help skin stimulate its natural energy and visible vitality. Re-Nutriv. Live a life of extraordinary beauty. Luxury Care For: Multiple signs of aging Loss of firmness, tone Even skintone Radiance Formula Facts: Dermatologist-tested Ophthalmologist-tested Won't cause breakouts, won't clog pores (non-acnegenic) How to Refill: This refill fits into your existing Brilliance Serum glass bottle. Twist collar counter-clockwise to unlock. Pull collar up to reveal empty refill. Remove empty refill and replace. Return collar onto glass bottle and twist clockwise to lock. How to Use: To use the product, apply to clean skin morning and night. Avoid eye area. To remove cap, first twist collar clockwise to ensure it is locked. Then open by pulling cap directly upward. *Percentage of women with improvement in Estee Lauder's Diamond-Brilliant Skin Score index, combining improvement in skin Radiance, Spot Intensity, Pores, Even Tone, Firmness and Elasticity, in clinical testing on 53 women, after using product for 4 weeks. **Clinical testing on 53 women, after using product for 2 weeks. ***Clinical testing on 53 women, after using product for 6 weeks.