Using these Tifosi Sizzle sunglasses is easy. Just put them on your face like regular sunglasses. They're great for various outdoor activities like going to the beach, running, or cycling. When you're done using them, avoid leaving them in direct sunlight for long periods as it might damage the lenses. To clean them, use a soft, damp cloth. Gently wipe the lenses and the frame. Don't use harsh chemicals as they can scratch the lenses or damage the frame. Keep them in the provided case when not in use to prevent scratches and keep them in good condition.