Final answer:
The fleece cap should not be worn with earmuffs to ensure it fits snugly and maintains a neat appearance according to dress code regulations.
Step-by-step explanation:
The question seems to pertain to a specific dress regulation, likely pertaining to a school uniform policy or a military dress code. The correct answer is that the fleece cap is not to be worn with any earmuffs but can be folded along the bottom edge for a proper fit. The rationale behind such a rule is typically to maintain a neat and uniform appearance. When the fleece cap is worn without earmuffs, it ensures that the cap fits snugly and looks tidy. Earmuffs, in this case, might disrupt the intended look or cause the cap to fit improperly.