Peep,
I THINK that one may be the reactive one. Columbia released the original version (which LOOKS identical) with a regular urethane coverstock, then later changed it to a flexel reactive coverstock.
I had the original urethane model and it was pretty mild, but the flexel balls were supposed to be much better. Even so, flexel would be considered REALLY mild by todays standards, but still good on burnt up shots.
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"The difference between stupidity and genius is that genius has its limits."
Albert Einstein