After being married for some years, my lady was helping me pack for a TDY tour. She noted that I had everything- condoms, tampons, bobby pins, and panty hose- Condoms- roll a pair of sox, tuck inside, tie a knot, toss in your ruck- they WILL stay dry. Tampons work better than field dressings. Bobby pins- ever need a safety pin for a detonator, and the original was lost? Panty hose? Cut apart at the crotch- you now have 2 M-16 socks. Fine enough to keep dust out, but you CAN fire when it is still in the sock.
Thank God for a trusting wife!