There have been some amazing military innovations over the years: freeze-dried food for MREs, jet aircraft, rail guns, and the soul-sucking website, Army Knowledge Online. But none of these compare to the simplest, most wonderful invention known to mankind: the poncho liner, affectionately known by all those who have felt its life-giving warmth as the “woobie.” Ask any soldier or Marine, especially those in the infantry, how he feels about his woobie, and his eyes will light up and then mist over as he waxes lyrically over the virtues of this item. Hard-bitten combat veterans grow poetic and wistful, declaring their love for this piece of equipment. If you don’t believe me, read the Amazon reviews. It is perhaps the single most-loved item in the armed forces.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.