The StriVectin Peptight 360° Tightening Eye Serum is a clinically tested eye treatment designed to visibly tighten, firm, and brighten the entire eye area. This Costco value pack includes a full-size 1 oz bottle plus a 0.25 oz bonus size, each equipped with a precision cooling metal applicator for comfortable, targeted application around the complete eye zone.

Formulated with StriVectin's patented Triple Peptide Blend—combining Oligopeptide, Dipeptide-2, and Palmitoyl Tetrapeptide-7—the serum targets upper eyelid sagging, crow's feet, and under-eye concerns with a 360° approach. The proprietary NIA-114 complex (Myristyl Nicotinate, a stabilized form of Vitamin B3) strengthens the skin barrier and enhances ingredient absorption. Caffeine and Kakadu Plum (Terminalia Ferdinandiana) Extract work to visibly brighten dark circles, while Microalgae Extract (Nannochloropsis Oculata) helps firm delicate, thinning skin. Additional skin-supporting actives include Adenosine, Aloe Barbadensis Leaf Juice, Sunflower Seed Oil, and Tocopherol (Vitamin E).

In a clinical evaluation of 32 panelists over 8 weeks, 100% showed improvement in the look of firmness and elasticity, 96% showed improvement in lines and wrinkles around the eyes, 93% showed improvement in under-eye bags and puffiness, and 87% showed improvement in eyelid crepiness. To use, apply morning and evening on clean skin by gently gliding the cooling metal applicator around the entire eye area including upper eyelids, then lightly pat any excess with a fingertip until absorbed. The formula is vegan and comes in sustainable packaging. Full ingredients: Aqua (Water, Eau), Propanediol, Glycerin, Myristyl Nicotinate, Dimethicone, Pullulan, Maris Aqua (Sea Water, Eau de mer), C12-15 Alkyl Benzoate, Dextrin, Palmitoyl Tetrapeptide-7, Nicotiana Benthamiana Octapeptide-30 sh-Oligopeptide-2, Dipeptide-2, Caffeine, Terminalia Ferdinandiana Fruit Extract, Hydrolyzed Rhodophyceae Extract, Nannochloropsis Oculata Extract, Perilla Ocymoides Leaf Extract, 1,2-Hexanediol, Phospholipids, Sodium Acrylates Copolymer, Bacillus Ferment, Silica, Polymethyl Methacrylate, Polyglyceryl-10 Stearate, Hydrogenated Polydecene, Steareth-20, Adenosine, Aloe Barbadensis Leaf Juice, Helianthus Annuus (Sunflower) Seed Oil, Tetrasodium Glutamate Diacetate, Hesperidin Methyl Chalcone, Butylene Glycol, Caprylhydroxamic Acid, Chlorhexidine Digluconate, Glyceryl Caprylate, Tocopherol, Ethylhexylglycerin, Xanthan Gum, Mica, Citric Acid, Phenoxyethanol, Sodium Citrate, Benzoic Acid, Sodium Benzoate, Potassium Sorbate, Sodium Hydroxide, CI 77891 (Titanium Dioxide).