ASTM F2413-18 APPROVED! Perfect LIGHTWEIGHT work book! Good for all terrain, all-weather. Like new, comes in box… (My husband just has too many boots.) This is a 10.5 (my husband wears a 10, but 10.5 allows for a heavier sock should you wish) *ASTM F2413-18 is a standard that covers footwear constructed and manufactured such that the protective toe cap is an integral and permanent part of the footwear. The standard contains requirements to evaluate the performance of footwear for: Impact resistance. Compression resistance. Metatarsal protection.