Proflex's pre-dated the Raleigh activators by about 3-5 years. Activator was a band wagon bike for the masses once raleigh saw that suspension was becoming popular with the then hardcore mtb set.
If my memory serves me correctly they were one of the first mass produced fully bouncy bikes. Hence the still developmental/early tech elastomer on the frame & forks.
Still preferred my hardtail with manitou 1's though.