Whether you�re addicted to adrenaline, crave cushioning or seek stability, the Brooks Adrenaline GTS� 6 is your �go-to shoe.� The Progressive Diagonal Rollbar controls pronation by guiding the foot into an efficient stride, for smooth transitions from heel-strike to toe-off. Fluid-filled HydroFlow� units and a resilient Substance 257� midsole team up to provide unsurpassed cushioning and flexibility. An upper with Element� Air Mesh linings transfers moisture to maintain a comfortable climate for hardworking feet, while an Internal Support Saddle adds upper support for a glove-like fit. Style number: 42166 (medium width), 42167 (narrow width)