OPI Nail Envy Nail Strengthener Strength + Colour All Night Strong (15ml) is part of OPI's Nail Envy treatment collection. With the fortifying power of OPI's original strengthener, this nail treatment combines gentle care for your nails and a hint of softly tinted colour. Available in a range of gorgeous shades, OPI brings you strength in colour by mixing their trusted formula with loved OPI shades. Wave goodbye to plain nail strengthener with Nail Envy All Night Strong covering nails with its cobalt blue and navy shimmer shade while helping to transform weak, brittle and damaged nails into a more robust and harder manicure. Nail Envy colour with Tri-Flex Technology strengthens and protects against chipping, peeling, and splitting, resulting in healthy-looking, vibrant nails that are 95% stronger in 1 week. Awaken your nails thanks to this Hydrolysed Wheat Protein and Calcium enriched, 2-in-1 miracle treatment. Cruelty-free & vegan-friendly. Directions of use: Apply two thin coats of OPI Nail Envy on clean nails. Apply one coat every other day to maintain the treatment. After one week of wear, remove the OPI Nail Envy with an acetone-free nail polish remover. The OPI Nail Envy Formula can also be used as a basecoat under nail polish to protect the nails from staining.