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Here's how it works. Cadet A is alergic to wool. As such, they can't wear have the wool socks on their skin. So either the cadet is permitted to wear just plain cotton socks, or the cadet wears the cotton socks under the woolies, the cadet will be ok. Now, the problem with option 1 is that it isn't uniform. The problem with option 2 is that wearing two pairs of socks is very warm, and it will cause the boot to feel small. So in comes option 3, the cadet cuts the woolies so that just the top portion(so from the ankle up) is left. They wear cotton socks underneath and the fakes up top so that the come out the top of the boot. So the cadet looks uniform without having an allergic reaction. Well, ideally that's why its done....