One of the things we have to always look out for on CAT or Fire losses is where we are putting our feet and what we are stepping on.  I keep my Tetanus shots up and haven't been severly hurt but those nails can be nasty.  I just found a product called "Rhino Tuff Puncture Resistant Insoles" which is a flexible stainless steel plate with padded support to slip into my regular inspection shoes and boots.  I ordered a pair and just received them today.  I think it might fit the bill.

The company appears to be small.  You can order on-line at www.rhinotuffinc.com

KLS

Looks like a good product to use for fire jobs especially where there are generally a ton of rusted nails in the debris. Years ago I had one go through the soles of my shoes (didn't have my boots on which was stupid to begin with), and almost all the way through my foot. Never went into a fire since without heavy boots, but still leary of the nails in the debris.