Sunday’s Seahawks-Vikings game at TCF Bank Stadium is set to be one of the coldest games in NFL history, and though the temperature is expected to rise to around zero by kickoff, it was -10 with a wind chill of -25 on the morning of the game.

A few Seahawks took the frost-covered field wearing shorts. During the game, Seahawks and Vikings players will be wearing specially designed underwear to help stay warm in the arctic conditions.

Seahawks warming up in shorts at -11 degrees Live reports from #SEAvsMIN @KING5Seattle Morning News is on pic.twitter.com/4ctjg6NVov — KING 5 News (@KING5Seattle) January 10, 2016

One player didn’t even have sleeves.