OPI Start-to-Finish Original Formula is a convenient and gentle 3-in-1 formula that combines superior natural nail strengthening with a long-lasting base and topcoat! Formaldehyde-free Base Coat, Top Coat and Nail Strengthener.

Base Coat, Top Coat and Nail Strengthener in one product, with OPI Start-to-Finish Original Formula there's no need for multiple products or extra steps to add strengthener to nails.