The Rocky Men's TMC Postal Approved Public Service Work Boots are designed with a focus on technology made comfortable. The men's work boots are approved by the U.S. Postal Service for use by its employees; but whether you are a postal worker or just someone who wants comfortable public service shoes, get these. You may have just found the most comfortable work boots for standing or walking all day. Made in the USA Non-metallic stabilizer for safety Full-grain water-resistant leather for durability Work boots are polishable for easy cleaning Aegis Microbe Shield applied to Rocky Air-Port cushion footbed Slip and oil-resistant TMC direct attach TPU and PU outsole for stability and flexibility S.R. USA Postal-Approved; Berry Compliant Shaft measures 4 in. in height 1 year limited warranty