• Exclusive breathable, waterproof, construction and materials. • Axis Chassis™ System offers optimal support and stability.  • Smart Degree Technology® temperature-regulating interior polymers activate at both hot and cold temperatures, so your feet feel just-right all day. • XC Foam® delivers superior cushioning, lightweight comfort. • Dual-width footbed can be easily removed to accommodate your own orthotic or wide foot. • Removable multi-density footbed with memory-foam cushioning and arch support. Constructed on an extra-chunky, extra-rugged Bex sole.