It sounds like pretty mundane stuff, but seasonal clothing changes have always been a problem for big armies in the field. The net effect of inadequate clothing, esp footwear, is a high non-battle casualty rate and loss of unit effectiveness. There are many glaring illustrations of this; Napoleon and Hitler's moves on Russia, the trenches of WW1, fighting in the Italian mountains and the Ardennes in WW2, and the Korean winter.
I don't know what the quality of winter kit is in the US Army today, but ours was always better. We once ran a winter exercise in Churchill which was attended by a US Army coy from Alaska. They called themselves the "arctic foxes", "wolverines", or something like that. The conditions were so bad, and their equipment was so poor, that we had to call a safety halt and bring them into Churchill to thaw out.
