The Chameleon Hex from Merrell features a second skin feel with a stretch collar topping a breathable mesh upper cinched by an elastic cord lacing system. In-Board EVA footframe with Air Cushion midsole delivers a tactile close-to-the-ground feel especially when matched to a Vibram Chameleon Speed sole. Slip Lasted Construction Nubuck Leather and Breathable Mesh Upper Single Layer Air Mesh Construction Treated with Aegis Antimicrobial Technology. Lycra-Air Mesh 4-Way Stretch Collar. Injection Molded TPU Counter reinforcement. Injection Molded TPU Instep Stability Arm. Adjustable Elastic Cord Lacing System. Injection Molded Speed Lace Hooks Friction. Cordlock 4.5mm Ortholite. Anatomical Footbed Nylon 6.6 Injection Molded Arch Shank. Exposed In-Board Compression Molded EVA Footframe. Merrell Air Cushion Midsole. 4mm Sole Lug Depth and Vibram Chameleon Speed Sole-TC5plus Rubber.