OPI Natural Nail Strengthener 15ml builds in layers for protection for natural nails, giving them a natural look while also strengthening them. Keeping nails strong and healthy is an important step in maintaining beautiful nails. The OPI Natural Nail Strengthener can help you do just that. This nail strengthener is a great investment to help natural nails grow strong. It is perfect for those who want to strengthen their nails while also giving them a natural look. What are the benefits and features of OPI Natural Nail Strengthener 15ml? Builds in layers for protection for natural nails. Gives nails a natural look while also strengthening them. Helps natural nails grow strong. Who is OPI Natural Nail Strengthener 15ml for? This product is perfect for those who want to strengthen their nails while also giving them a natural look.