They each just wore nine of them.
As part of the Canadiens regular video bit "The Duel" the pair raced to see who could get on all the sweaters first.
Shaw took the early lead, but Byron scored a comeback victory thanks to a late check before getting the final one, a Canadiens-themed sweater vest, on and pulled down.
With all nine sweaters on, the two were puffy enough to resemble Santa Claus.
Shaw scored his revenge in the second round, a challenge to see who could get all the bulky sweaters off and on the ground first.
Bonus points to Shaw for wearing shorts for the competition (smart, those sweaters get hot) and for his radio announcer guy voice at the start of the bit.
