Could this be a preview of Packers' new alternate uniforms?
Packers unveil new 1950s throwback uniforms to wear in Week 7
The Wearing Of the Green (and Gold): Confirmed: New Throwbacks in 2015
Packers unveil alternate uniform based on 1950s threads
Bears to wear throwback jerseys for Week 4; will Vikings follow suit? - Daily Norseman
Green Bay Packers Unveil Alternate Jersey - Sports Illustrated Green Bay Packers News, Analysis and More