Changes

The Altra Instinct 4.0 is a much better shoe than the previous [[Altra Instinct 3.5| 3.5 version]], and comes a surprisingly close to my favorite iteration, the [[Altra Instinct 2.0| 2.0 version]]. The cushioning-to-weight ratio is pretty much the same as the 2.0, with the 4.0 being slightly lighter, and slightly less cushioned. This version of the Instinct is a smooth riding shoe, with nothing much to interfere with your biomechanics. The shape matches the human foot nicely, so it doesn't crush your toes, though I do wish there was more height in the toe box. The upper is nicely breathable and open, and it's a comfortable shoe even though it's not got to the excessively padded, skateboard feel that the 2.0 did. This is an initial preview rather than a full review, so I'll update it once I've put more miles on. {{H:WhatToLookForInShoes}}