Our Metatarsal Guard styles offer maximum flexibility, comfort and durability. Our light-duty Nautilus Metatarsal Guard features hinged construction and a long-wearing toe wrap to offer the ultimate in protection and wearability. The Avenger Internal Metatarsal Guard provides heavier duty protection including high heat outsole protection to 600° F. All FSI Metatarsal Guards meet or exceed ASTM 2413-05 Section 5.3 specifications.