Adidas Terrex Fast X Mid GTX Boot - Men's Mesh / Synthetic traxion sole Lining: Gore-Tex extended comfort footwear - waterproof and breathable. Iddeal for higher activity levels. 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.