Never been in a wind that caused the air pocket to be eliminated (during the winter - spsring/summer winds different story), but that's because I wear the my heavier kilts. however even if it was, it would only be marginally colder than air whistiling through your legs while wearing jeans.

As for coats. The two I wear come to mid calf, so what ever length that is.

Story from last winter. My wife and I were coming home from somewhere late one night. A snow storm earlier that week was causing us to park at the local highschool about 1/2 mile away. I dropped her off at home, parked, walked home, then walked back to the car when I realized I had left a 4 pk of Guinness in the car, then back home. I was wearing my PK, Long coat (it is cashmeire), sweat shirt, Kilt hose, hiking boots and a hat. Watching the news that night (shortly after we got home) I was informed that th Temp was 7F and with the wind chill was well below 0