1971 ALCS Game 2 ticket stub Athletics vs Orioles

What’s with the snowflake/cotton ball behind The Oriole Bird on this 1971 ALCS Game 2 ticket stub Athletics vs Orioles? Would love to find out.

This ticket stub available for purchase

1971 ALCS Series Recap by Baseball-Reference

Click to view all Baltimore Orioles ticket stubs

1971 ALCS Game 2 ticket stub Athletics vs Orioles

 

1971 ALCS Game 2 ticket stub Athletics vs Orioles