Same mask, with no valve.
Non-valved Vogmasks feature the same highly efficient particle filtering media sewn into the middle layer of the mask as the valved Vogmasks. However, non-valved Vogmasks filter both inflow and outflow. Vogmask is offered in valved and non-valved respirators.

NON-VALVED VOGMASKS help protect both the mask wearer from inhaling microscopic particles AND help protect the environment from the exhaled droplets of the mask wearer.  Non-valved Vogmasks feature the same highly efficient particle filtering media sewn into the middle layer of the mask as the valved Vogmasks. Note that non-valved Vogmasks filter both inflow and outflow.

Non-valved Vogmask are products marked VMR, VMC (with carbon), and Organic VM.