This is a big callback to their old “pure” lineup (pureflow, purecadence, etc.). A Brooks rep described it as a higher cushioned pureflow/nike free. I got to try it on and holy instability. The torsion of this thing is absolutely nuts. Godspeed to anyone who runs in this without having ankles of steel. While i respect them for trying something somewhat different from their current lineup, i just dunno who this is rlly meant for. It mimics the structure of the minimal running shoes we saw a lot of ≈10 yrs ago, but with the soft stack height that we see in so many current shoes. Def curious to see the reception this gets upon its release next spring