adidas outdoor Terrex Fast X Hiking Shoe - Men's Sharp Grey/Black/Vivid Red 8 Mesh / Synthetic traxion sole Traxion and Continental rubber outsole provides extraordinary grip. Inlay: Molded Ortholite sockliner and best foot climate and comfort. Midsole: Full forefoot and adiPRENE+ for forefoot propulsion and efficiency. Midsole: Outdoor specific Formotion unit for enhanced motion control and downhill comfort. Outsole: Traxion featuring Continental rubber for extraordinary grip.