Designed for high performance on trail runs ranging from 40 km to 170 km. This model particularly shines on rolling terrain in the mountains. Energy return: Patented carbon plate and Fastech + technology to maximize explosive boost Cushioning: SCF Foam, 100% ATPU, for great propulsion combined with excellent cushioning Lightweight: 255 g (8) Grip: Vibram Megagrip Litebase for unrivaled grip Traction: 'Vibram Traction Lug' sole with 4 mm lugs