Inov-8 Terraclaw 220-U Trail Runner 100% Textile and synthetic Imported Rubber sole For mild to moderately technical trails, racing The dual-c sticky rubber outsole compound of hard and sticky rubbers grasp even slick rock while the multi-directional lug pattern allows for debris release Designed for speed on race day at only 220g and a 4mm drop using lightweight materials and removing protections the advanced racer doesn't need Stripped back welded overlays on the toe bumper and upper and a diagonally sewn tongue for debris defense keeps the foot protected with minimal added weight. The mesh upper material allows for greater drainage and breathability