General Fast and light, comfortable and supportive, the Aerios FL 2 Mid GTX is for extended hikes on technical trails. The design synthesizes with your foot to minimize friction, and the collar adds support and helps seal out debris. The upper is light, durable, and made from 100% recycled polyester, the lacing system wraps the foot for a natural fit and feel, and a GORE-TEX membrane delivers waterproof, breathable protection. Agility, stability, and confidence underfoot come from the Vibram Megagrip outsole, compressed EVA midsole, and integrated TPU shank. Technical details Ideal use: Hiking, Trekking Materials: Upper: GORE-TEX membrane Condora mesh : Single layer Recycled Polyester mesh Midsole: Compressed EVA 0.4mm TPU high abrasion protective film Outsole: Vibram MegaGrip rubber Chassis: Injected TPU, 70 Shore D Optimized mid height provides ankle support 0.8mm microfiber heel lining Protective toe cap Moisture wicking Laces closure Lightweight Waterproof Breathable Windproof Durable Footwear Width: Standard Weight: 740g