Real nail polish strips with detailed mandala lace pattern. Teal fades into purple. Easy peel-and-apply. Long-lasting wear. These have been stored in a cool, dry area away from direct sunlight and high humidity for approximately 2-3 years Color Street officially states that unopened nail strips have a shelf life of 1 year from the date of purchase, provided they are stored properly in a cool, dry, and dark place. While one year is the guaranteed timeframe, many users Report successful application of sets that are 2 to 4 years old