A classic bomber jacket with ribbed knit collar and cuffs details does something important which is actually close off the openings properly so you feel the warmth. Ribbed knit is stretchy and fitted so it stays in place rather than gaping. The ribbing also adds visual detail that reads as slightly elevated compared to a flat collar. Ribbed cuffs mean the jacket works properly at the wrist without bunching or sliding. The construction detail changes how structured the jacket looks and feels. Ribbed knit collar and cuffs are a small detail but they affect how the jacket functions and how it reads visually. These are the classic bomber jackets that work because the details mean they are both practical and intentionally designed.