Road Trail Run: Altra Running Instinct 4.5 Review: A Heavier Trainer with Sublime Upper Comfort and Room, over a Lively, Firm Base
Road Trail Run: Altra Running Instinct 4.5 Review: A Heavier Trainer with Sublime Upper Comfort and Room, over a Lively, Firm Base
![Today's reviews from Running Product Review: Altra Instinct 4.0, $110, by Cregg Weinmann - runblogrun Today's reviews from Running Product Review: Altra Instinct 4.0, $110, by Cregg Weinmann - runblogrun](http://www.runblogrun.com/wp-content/uploads/2022/04/Altra20Instinct204.02024110-thumb-500x306-25802.jpg)