This is a 2 part question regarding ADHESION & STRUCTURAL INTEGRITY OF THE NAIL. ADHESION)7-10 days Wear time depends on how well you prep your natural nails before application, your choice of adhesive, and your daily use. The key to longer wear time is prepping your nails with the supplies included, and avoiding long term exposure to water and manual labor. It is not unusual to pop gems, but take care when wearing your delicate art. Nails are not tools. DOUBLE SIDED GEL TABS can hold anywhere from 1-3 days and are perfect for temporary wear and special occasions.WITH GLUE,your nails can last anywhere up to 2 weeks or longer! Never continue to wear nails that are lifting as it can become a source for bacteria to breed. Remove lifting nails, then clean and dry before reapplying nails. STRUCTURAL INTEGRITY OF THE NAIL)14-21 days your press on nails are made with salon products to be durable and flexible. Nails are made with at a minimum, 4-5 layers of gel to ensure they are strong enough to withstand daily wear and exposure to chemicals like hairspray, sunscreen, and toners. Strong yet flexible enough to be comfortably worn. Luxe nails or nails with 3D designs are delicate, so take extra care when wearing.