How to use: Just put on the sunglasses like you would with any other pair. Adjust the temples to fit your head comfortably. The adjustable ear pieces can also be tweaked for a better fit. Remember to use the included case to store the sunglasses when not in use. This will protect them from scratches and damage. Maintenance: Clean the lenses with a soft, microfiber cloth. Avoid using rough materials that could scratch the lenses. You can use a bit of lens cleaner, but make sure it's suitable for polycarbonate lenses. When you're in a wet environment, the hydrophilic rubber will help keep the sunglasses in place. But be careful not to bend the frame too much, as it might affect the fit and durability. And always ensure the sunglasses are properly stored to maintain their UV - protection and other features.