Mammut Aenergy Trail Endurance Ultra Low GTX is a grippy, endurance-focused trail running shoe designed for mid-to-long-distance runs. It combines powerful energy return with Vibram Megagrip traction for reliable performance on technical terrain. Key attributes: Black | Black white | 3D knitted | Waterproof (GORE-TEX Invisible Fit) | High rebound and responsiveness (Mammut CORE Ultra + CORE Plus foams) | Excellent traction on wet and dry terrain | Durable protection against trail debris | Flextron® PRO propulsion plate for energy return | Ortholite® insole for long-lasting cushioning | TPU-reinforced rand for rock protection | Base Fit midfoot structure and lacing system for secure hold | Vibram Megagrip outsole with Litebase technology | Ultra-low (low-cut) silhouette | Rocker profile for smooth heel-to-toe transition | Ergonomic memory-foam heel pods | Semi-sock tongue with perforated PU foam | Dimensions & fit: Weight (US 9.5): 320 g | Heel drop: 8 mm | Flex index: A6