Seven ways NFL players stay warm in frigid conditions - NFL - ESPN
75 for 75: Bears Weather Game
Best of braving the weather
How NFL players stay warm during sub-zero games - The Washington Post
Scales: From a sideline reporter, NFL tricks for staying warm in freezing weather
How NFL players stay warm during extremely cold weather
How Do Football Players Stay Warm In The Bitter Cold?
How well do the Packers perform in the cold? What type of weather impacts football the most?
Rain, sleet or snow: How NFL players stay warm during the coldest games - Sports Illustrated
'Sticky' fad catching on in NFL, Sports
How Do NFL Players Stay Warm In Extreme Cold?
Best of braving the weather
How do NFL players stay warm in the extreme cold? - Quora
Football Weather'-Diving Into The Effects of Weather on NFL QB Performance, by Josh Mancuso