Sandia Raven 6-Quart Backpack Vacuum W/ 5 Pc Tool Kit - 70-2001Sandia 70 2001 Increased Airflow: The Ravens deflector plate holds heavy debris away from the motor filter during use. It prevents the cloth bag from contacting the motor filter and reducing airflow. Excellent Design: by tapering the vacuum body 3 4" per side, it prevents a bulging bag from contacting the body, allowing airflow around the bag. Most Quiet in its Category: by adding 70 square inches of sound dampening waffle foam material, the Raven is