Women’s 5″ Aluminum Broad Toe Internal MetGuard.Metatarsal – Internal MetGuards provide flexible protections and increased comfort. In addition, External MetGuards are also available on select Carolina styles. Meets ASTM F2413-18 Class Mt75 metatarsal impact-resistance safety standards.Slip Resisting – Soles designed and constructed with materials to meet the standard for slip resistance.Aluminum Toe – Weighs less than steel and meets the ASTM Standards for compression and impact testing rating of ASTM F2413-18.Electrical Hazard – Footwear tested by an independent lab that can withstand applications of 18,000 volts at 60hz for one minute without leakage.Pillow Cushion™ – A layer of memory foam that wraps the foot in comfort. Combined with existing insole systems, it offers the ultimate in cushioned comfort.