The quality of these sunglasses are outstanding. There is not incorrect way to wear them since there is not a top and bottom. No hinges means there is nothing to break. These are equipped with a cord to prevent loss and help to ensure they over the head of the child. I appreciate the quality of the optics. There is no reason to skimp on childrens eye protection when these are available. These optics come with a pouch to protect against accidental scatching when not being worn.