Women's Caldera 8 runprolow the new Mach X is

the new Mach X is supercharged with a layer of PEBA foam that’s 34% more resilient than the Carbon X3 foam

The plush footbed is constructed using high-performance fibers made from post consumer water bottles

this shoe delivers exceptional energy return in an ultra-lightweight design

Solid rubber outsole provides additional forefoot stiffness at toe off

Women's Caldera 8 runprolow the new Mach X isBrooks Caldera 8 The Brooks Caldera 8 is back, now better than ever. Built with ultra marathons in mind, it features plush cushioning for exceptional comfort on even the longest trail runs. With an enhanced fit, upgraded materials, and a breathable performance upper, the Caldera 8 delivers a smooth, adaptable ride that keeps you going mile after mile. Key Features: Cushioning: High Support: Neutral Heel to Toe Offset: 6mm Stack Height: 38mm 32mm