Your search for "safety shoes" revealed the following:

3M™ Versaflo™ Air Regulating Valve Assembly V-300/37019(AAD), 1 EA/Case

Allows the worker to set the airflow to the most comfortable level. Includes the valve and waist belt. It is strictly a regulator and will not warm or cool supplied air to the worker.

3M™ Versaflo™ Respiratory Hard Hat Assembly M-305, with Standard Visor and Faceseal, 1 EA/Case

Used with an approved air source, M-300 Series hardhats provide respiratory (OSHA APF=25) and limited head (ANSI Z89.1-2003 Type 1 Class G) and eye (ANSI Z87.1-2010) protection. The M-305 assembly includes a standard visor and standard faceseal.

3M™ Speedglas™ Heavy Duty Breathing Tube SG-40W/37269(AAD), 1 EA/Case

Replacement heavy duty rubber breathing tube for 3M™ Adflo™ and TR 300 SG PAPRs when used with 3M™ Speedglas™ Welding Helmets 9100 FX Air or 9100 Air. Connects welding helmet to turbo unit.

3M™ Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor 1 EA/Case

This panel is an eight outlet air purification system that monitors carbon monoxide (CO). It has numerous features that add to worker protection. It is packaged in a protective carrying case for total portability.