Using these Vans sunglasses is easy. Just put them on your face and adjust them to fit comfortably. They're great for general outdoor use to protect your eyes from the sun's glare and UV rays. But remember, don't use them to look directly at the sun or in places with artificial light sources like solaria. They won't protect your eyes from mechanical impacts, so be careful not to expose them to such hazards. And never wear them when driving at night or in low - light conditions. To keep them in good shape, clean the lenses with a soft, lint - free cloth. Store them in a protective case when not in use to avoid scratches.