Throughout the early 70's a smart guy by the name of Eric Giese had worked for NASA in the days of early space suits for the first landings on the moon. The big problem in space suits is they had cooling, heating and electric lines running throughout the suit and as the astronauts did space walks they had a big problem with them kinking and getting crimped when people tried to walk with their knees and ankles flexing. The solution was articulating hinges which had ribs to allow flex in the ankles, knees and elbows to preserve the shape of the suit around the joint. Today you see this on everything from water pipes to flexible drinking straws.

In 1978/79 living in Aspen, Eric applied this concept to skiing. He independently developed some very unique boot design concepts that included a floating ribbed tongue instead of an overlap. His goal was to enable the boot to flex without bulging/distorting in the lower shell. This was the largest single problem of the day, especially since ski boots at the time had no ankle hinge. The ankle is of course a critical area of fit where any distortion would immediately causes a loss of control. This is how the ribs of the original Raichle flexon tongue were conceived.