Inov8 Roclite 285 Trail Running Shoes Meta Flex - This is an anatomically aligned groove in front of the metatarsal heads to give you a natural fore foot flex. Meta-Shank - New 5 finger meta-shank aligns with each individual metatarsal for greater flexibility when contouring while retaining underfoot impact protection. A softer compound is used on performance products while a firmer compound is used on the endurance product. Met Cradle - The upper webbing support in this boot is anatomically positioned to cradle the fore foot behind the metatarsal heads and provide a secure foot hold whilst running. Fascia Band - A replication of the plantar fascia ligament to increase propulsion efficiency and reduce fatigue. TPU Lacing Support - lacing attached polymer upper supports and cradles the foot more e evenly.