In the late '60's/ early '70's, most civilized armies in the world did away and started issueing proper wet weather gear and groundsheets. They are far more efficient. Waste of time, yep at night when the temperature hits +3F, and your just wrapped in your ponch and nothing else, you might get smart enough to re-evaluate. But I doubt it. Constant expose to the elements does nothing but weaken your chances of survival. But then gunkid has never spent a night in the bush!