Dynafit Ultra 100 Trainers offer the perfect balance between maximum cushioning, traction and excellent energy return. Thanks to their great adaptability, they are the perfect shoes for ultramarathon running on any type of terrain. Features: Maximum cushioning Ultra-comfortable Ideal for long-distance racing Vibram sole Weight: 309g Drop: 6mm Technology: Vibram sole Most of the Dynafit collection uses exclusive Vibram soles, both for the design and the specific shape of the sole, as well as the leather used in their manufacture. The outsole is also designed for the specific needs and end use of the shoes.