Using your Baby Vipes is super easy. Just adjust the elastic strap to fit your baby's head comfortably and put the sunglasses on. These sunglasses are great for outdoor activities to protect your baby's eyes from UV rays. Remember, these are for babies, so keep them out of reach when not in use to avoid any accidental damage. When it comes to maintenance, use the included soft pouch to clean the lenses gently. Avoid using harsh chemicals as they can damage the 1.8mm polycarbonate monolens. Also, store the sunglasses in the provided box when not in use to keep them safe and scratch - free.