The cheap copies sold here actually offer pretty good grip, I've worn them on wet rock, and had no problems. Sloggi is a brand of (comfortable) underwear here.My hubby works in the hyperbaric chamber at the local hospital , they get them cheap. All the nurses wear them in post OP. A word of warning , they are lethal in the wet. I broke my wrist 2 years ago so I don't wear them in the winter. My orthopedic surgeon told me that since the invention of crocs, his business was booming. I have my trusty ' sloggies ' as my chook shoes.
Sounds like your husband has a high pressure job. (I did say I make crappy jokes)