Setup: These sunglasses come ready to wear. Simply unpack them and place them on your face. Ensure they sit comfortably on your nose bridge and behind your ears. Minor adjustments to the temples can sometimes be done by an optician for a perfect fit, but avoid attempting significant adjustments yourself to prevent damage. Compatibility: Designed for adult males, these sunglasses are generally compatible with various face shapes. The `54-16` measurement indicates a lens width of 54mm and a bridge width of 16mm, which is a standard size. Care: 1. Cleaning: Use the provided microfiber cleaning cloth to gently wipe lenses. For more thorough cleaning, rinse lenses with lukewarm water and a small drop of mild soap (avoid harsh chemicals or abrasive materials). Dry with a clean, soft cloth. 2. Storage: Always store your sunglasses in their protective case when not in use to prevent scratches and damage. 3. Handling: Avoid placing lenses face down on any surface. Do not expose them to extreme heat, such as leaving them on a car dashboard in direct sunlight, as this can damage the frame or lens coatings.