With GORE-TEX gasket construction, there’s no good reason to stay inside. The Merrell Air Cushion midsole cushions each stride and keeps the foot centered and balanced, and a tough injection molded nylon shank makes each step as stable as the last. Just for good measure, Merrell added a 5mm lug sole for superior traction in all conditions. GORE-TEX Gasket Construction. Waterproof Nubuck Leather Upper. GORE-TEX Fabric Lining. Breathable Aegis Antimicrobial Air Mesh Construction. Breathable Padded Tongue. Injection Molded TPU Counter Reinforcement. Injection Molded TPU Instep Stability Arm. Protective Molded Rubber Rand. Protective Molded Rubber Toe Bumper. 4.5mm Anatomical Ortholite Footbed. Nylon 6.6 Injection Molded Arch Shank. Exposed In-Board Compression Molded EVA footframe with Grade 4 Tapered Nylon Insole Molded to Bottom. Merrell Air Cushion Midsole. 5mm Sole Lug Depth. Vibram Chameleon Speed Hiker Sole/TC5+ Rubber.