The Chameleon Arc Stretch from Merrell has an arc that responds to the urge to stretch out whether its a matter of pace pursuit or comfort. Lycra neoprene and mesh upper goes on easily. Anchored by protective leather ribs elastic lacing self adjusts for a continuously close fit. Merrell In-Bord EVA footframe keeps the foot centered and the look low and sleek. Multi-directional tread on Vibram Chameleon Arc sole wraps up into a protective sidewall.