The Blade Light Run is an ultra-light super-cushioned running shoe, featuring cutting edge Blade-Light technology, engineered to shave minutes off your time while training or racing. 9.3oz. Midsole/Outsole; Anatomically placed K-EVA "blades" are aligned to the angle of impact and critical flex points for ultra-light, super cushioned, and amazingly flexible ride. The top layer of low density(52d)K-EVA in the GuideGlide format provides second stage impact protection and natural foot guidance. A micro layer of Superfoam sits underneath the K-EVA sockliner to provide a soft and resilient feel under the foot.