3M Secure Click Hard Case Particulate Filter D9035, P3 R is approved for use with 3M Secure Click Respirators to provide protection against exposure to particles, dusts and mists in environments containing certain particles.This P3 R filter is designed to protect against a wide range of particulate contaminates in higher-heat applications. An innovative solid-top air-inlet helps reduce premature loading by allowing a channeled airflow. The comfortable, lightweight design provides a wide field of vision and the filter can be clicked into place quickly and easily onto 3M Secure Click Reusable Respirators.