With an unprecedented 55% resiliency, OrthoLite® X55™ foam provides the ultimate wearing experience—with awe-inspiring step-in comfort and all-day energy return that sets a new standard in comfort and performance. OrthoLite® X55™ is engineered to enhance every wearing occasion- including casual, dress, outdoor and athletic footwear. X55™ resiliency and energy return help contribute to less foot fatigue and provides unrivaled stability, comfort and performance under all conditions from on the court, to out on the trails, or on the way to the office.