How to use: Simply put on the sunglasses and adjust the ear pieces to get a comfortable fit. You can choose the lens according to different light conditions - smoke lens for sunny days, clear lens for low - light situations. Attention: Don't wear them during activities that require high - precision vision. Avoid scratching the lenses by keeping them away from sharp objects. Maintenance tips: Clean the lenses with a soft, lint - free cloth. When not in use, store them in the provided case to protect them from damage.