Anti-aero resistance training jerseys? Is there any manufacturer that makes specific anti-aero training jerseys for increased effort at lower speeds? Sort of like a braking parachute but more practical and subtle?

My reason for asking is that I want my fairly short commutes to give better training while not requiring unsafe speeds in city riding.

Edit: and just to explain.. I'm not so keen on adding weight to my bike or person - not only because it is unpractical, but also because it would make the effort more uneven and more like interval training rather than sustained effort.
Since drag is related to velocity squared at low speeds anti-aero won't do much.  Bulky regular clothes but that won't change your aerodynamics much. Why not just divert and take a longer route to commute?