Carhartt Men's CSA 10-inch Rugged Flex Wtprf Isulated Work Pull-on Comp Safety Toe Cmr1999 Industrial Boot Leather and Synthetic Imported Rubber sole Shaft measures approximately 10" from arch Boot opening measures approximately 13.5" around Upper is brown oil tanned leather with Neoprene shaft and black PU coated leather Outsole is Cement constructed with Carhartt rubber Rugged Flex outsole Removable EVA cushion insoles Storm Defender waterproof membrane and 400 gm 3M Thinsulate insulation CSA Grade 1 Safety Toe and Puncture Resistant Swen Flex PR Plate and ASTM 2413-17 PR EH