To use these sunglasses, simply place them gently on your little boy's face. The removable neoprene straps can be adjusted to fit comfortably. Make sure the sunglasses are centered on his eyes for proper UV protection. When not in use, store them in a safe place to avoid scratches. Clean the lenses with a soft, dry cloth. Remember, these sunglasses are for boys aged 0 - 2 years, so keep them away from small children who might put them in their mouths.