Lets look at some kit that will suit your suit.To begin with, proper leather shoes and a suit of natural materials is going to provide greater protection than the business casual slob look. Do you wear pocket squares? A silk or irish linen handkerchief is an expedient face mask and trauma bandage. www.mulberrywood.com ( just don't tell David or Noina I suggested such use!)A pair of fine leather gloves will slip into a breast pocket, and if exhibiting a slight bulge, fit in with your ensemble to the curious.Get a good PHOTON for your keychain. There are some very good miniature radios, one sold by a vendor/poster here,that are unobtrusive. Even water can be had in a few mylar envelopes. Again, unobtrusive, but enough to wet a handkerchief or assist swallowing medications.