What does an updated TRI-FLEX mean though?
Well, the TRI-FLEX groove itself increases force dispersion over a greater surface area while also delivering optimal flexibility and traction. Saucony improved the groove of the outsole in the above-mentioned Fall 2017 models, something that has been in place since Spring 2016 actually.
The updates? More ground coverage (thicker) for more protection and durability. "The original TRI-FLEX patterns were a little too thin and seemed to wear down quickly; however, the benefits of the specific design stays the same," says Saucony Shadow Representative Michael Knestout.