Here is a pic of the infamous pants worn by the Flyers (card on the right). Good stuff.

For the 1981-82 season, the Philadelphia Flyers introduced the decade's most radical idea -- long pants, as modeled here by Brian Propp. The idea behind the new pants, manufactured by Cooper under the name Cooperall, was to create a faster, lighter uniform, with lighter padding underneath. The pants did make the skaters faster; unfortunately, they were also faster whenever they took a spill and would crash very hard into the boards. The Hartford Whalers joined the Flyers in wearing long pants the following season. At the end of the 1982-83 season, the NHL outlawed the long pants, causing both the Flyers and the Whalers to revert back to the old faithful, time-tested short pants.

http://www.nhluniforms.com/