Particulate respirators are the simplest, least expensive, and least protective of the respirator types available. These respirators only protect against particles. They do not protect against chemicals, gases, or vapors, and are intended only for low hazard levels.
A factory tow package usually includes heavy duty rear shocks/springs and an auxiliary transmission cooler in addition to the tow hardware itself, and sometimes they include a full size spare tire too. When a dealer installs it they just put on the hitch and wiring plug.
The towing package gave you a hitch and trailer wiring (basic 4-pin) and Trailer Sway Control built into the traction control system. The Max Tow package is identical, except it adds 3.73 gears. On the 4-door, the towing capacity is 3,500 lbs. (grossly under-rated, but that's what it is).