Football weather in the winter could feature icy or snowy fields as players bundle up on the sidelines.
But what about coaches?
Kansas City Chiefs head coach Andy Reid surely felt the frigid temperature in his team's wild-card game versus the Miami Dolphins on Saturday.
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One of the coldest NFL games of all time at minus-4 degrees and a wind chill of minus-26 degrees at Arrowhead Stadium, Reid could be seen on the sidelines with what appeared to be icicles on his mustache.
Here's a closer look in picture form:
NFL
Reid, 65, saw his team take a 16-7 lead at the half with plenty of drops and bad throws transpiring on both sides.
Patrick Mahomes and Isiah Pacheco fared better than Tua Tagovailoa and Raheem Mostert, though. Mahomes completed 15 of 26 passes for 167 yards, one touchdown and no picks while Pacheco ran for 65 yards on 12 carries.
Tagovailoa completed 6 of 11 passes for 94 yards, one touchdown and one pick with the lone score coming from a 53-yard heave to Tyreek Hill. Mostert ran for 28 yards on seven carries.
While the Chiefs and Dolphins are playing, the Buffalo Bills-Pittsburgh Steelers matchup scheduled for early Saturday was postponed to Monday due to a winter storm.