Using this Captain America mask is super easy. To use the pop - up lens feature, just slide the pegs on the sides of the mask to move the lens up and down. When putting on the mask, stretch the back strap and place it over your head. Make sure it fits comfortably. As for maintenance, keep it away from sharp objects to avoid tears. If it gets dirty, you can gently wipe it with a soft, damp cloth. When not in use, store it in a dry place. Also, this mask is designed for kids 5 and up, so make sure younger kids use it under adult supervision.