The term 'Winter Hat Feature' can be broken down into two crossword solutions: 'earflap' (7 letters) and 'EARLAP' (6 letters). An earflap is a piece of material that hangs from the sides of a hat or cap, covering the ears to provide warmth in cold weather. An EARLAP is similar to an earflap, but it is a single piece of material that covers both ears. Both earflaps and earlaps are common features of winter hats and caps.