OPI Nature Strong, je prvi OPI lak za nokte prirodnog porijekla, koji traje do sedam dana. Koristi lak za nokte u boji, s Nature Strong nadlakom za nokte za dugotrajno nošenje.
Sastojci: Butyl Acetate, Ethyl Acetate, Nitrocellulose, Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer, Acetyl Tributyl Citrate, Alcohol, Stearalkonium Bentonite, Isopropyl Alcohol, Diacetone Alcohol, Barium Sulfate, Sorbic Acid, Hexanal, Lithothamnion Calcareum Extract, Phosphoric Acid, Mannitol, Solum Diatomeae/Diatomaceous Earth/Terre de Diamtomees, Zinc Sulfate, Silica, n-Butyl Alcohol, Tocopherol, Titanium Dioxide (CI 77891), Red 6 (CI 15850), Yellow 5 (CI 19140), Iron Oxides (CI 77499), Ferric Ammonium Ferrocyanide (CI 77510).