What is the fine-grained topic of the following text: Avery Dennison's Dual Reflective exterior film lines - DR Grey X and DR Grey XTRM - combine a silver reflective outer layer that improves comfort by reducing glare and solar heat from penetrating the window; with a stylish neutral grey, low reflective inner layer that preserves the view outside. Only return the topic.
Avery Dennison's Dual Reflective Exterior Film Lines features and benefits