S3 Certification Fibre Glass Toe Rugged Flex® Scuff cap protects boots without adding weight Performance shank provides extra stability Lightweight Water Resistant MI Advice - these are a fantastic boot and a generous fit to allow thick socks, if you are unsure go down a size. For example the 9.5 is perfect for a size 10 foot. F702903 Detroit 6" S3 Mid Work Boot Black