Inov-8 X-claw 275 Trail Runner 100% Synthetic Imported Rubber sole For all extreme terrain running, including off-trail conditions encountered on mountains and fells. Phenomenal grip: New X-CLAW outsole features DUAL-C compound (a mix of medium and hard sticky rubbers) for improved durability and stability. Refined claw cleat stud configuration ensures quick release of mud and debris. Increased comfort on long runs: Unique POWERFLOW midsole technology delivers 10% better shock absorption and 15% better energy return than standard midsoles. Wider to box allows toes to splay. Enjoy more protection: Super-durable, yet lightweight, upper material, full rand, toe bumper and internal gusset offer protection on descents and from debris. Water repelled by durable water resistant coating. Does it all: Equally adaptable to training or faster running. Cutaways on the outsole increase flexibility and reduce weight. Dynamic Fascia Band delivers kick of energy with every stride.