The ECCO® Biom Evo Racer is a lightweight, minimalist running shoe that provides anatomical support to help guide the foot through its optimal natural stride. The EVO Racer is designed around an anatomically detailed last with an integrated Ecco BIO Fit Frame. This results in a shoe that fits like a glove, for an extremely close, athletic fit. The direct-injected polyurethane sole material results in a more comfortable ride. A new floating shank creates an outstanding transition through your gait cycle, and the low-to-the ground, 5mm drop results in a more natural running feel. The synthetic leather and textile upper allows your foot to breathe, and an asymmetrical collar and tongue provide better fit and support without hampering your foot's natural movement. Wt. 8.6 oz.